diff --git a/apps/api/src/policies/lookups.controller.ts b/apps/api/src/policies/lookups.controller.ts
index 9ca29a9..7a31e55 100644
--- a/apps/api/src/policies/lookups.controller.ts
+++ b/apps/api/src/policies/lookups.controller.ts
@@ -6,11 +6,14 @@ import {
   Param,
   Patch,
   Post,
+  Req,
   UseGuards,
 } from "@nestjs/common";
+import { Request } from "express";
 import { AuthenticatedGuard } from "../auth/authenticated.guard";
 import { AbilityGuard } from "../auth/ability.guard";
 import { RequireAbility } from "../auth/require-ability.decorator";
+import { AuditService } from "../common/audit.service";
 import { PoliciesService } from "./policies.service";
 import {
   AdjusterDto,
@@ -29,7 +32,14 @@ import {
 @UseGuards(AuthenticatedGuard, AbilityGuard)
 @Controller("lookups")
 export class LookupsController {
-  constructor(private readonly policies: PoliciesService) {}
+  constructor(
+    private readonly policies: PoliciesService,
+    private readonly audit: AuditService,
+  ) {}
+
+  private actingId(req: Request): string {
+    return (req.user as { id: string }).id;
+  }
 
   @Get()
   list() {
@@ -38,49 +48,99 @@ export class LookupsController {
 
   @Post("providers")
   @RequireAbility("lookup:manage")
-  createProvider(@Body() dto: ProviderDto) {
-    return this.policies.createProvider(dto);
+  async createProvider(@Body() dto: ProviderDto, @Req() req: Request) {
+    const row = await this.policies.createProvider(dto);
+    void this.audit.log(this.actingId(req), "lookup.provider.create", {
+      providerId: row.id,
+      name: row.name,
+    });
+    return row;
   }
   @Patch("providers/:id")
   @RequireAbility("lookup:manage")
-  updateProvider(@Param("id") id: string, @Body() dto: UpdateProviderDto) {
-    return this.policies.updateProvider(id, dto);
+  async updateProvider(
+    @Param("id") id: string,
+    @Body() dto: UpdateProviderDto,
+    @Req() req: Request,
+  ) {
+    const row = await this.policies.updateProvider(id, dto);
+    void this.audit.log(this.actingId(req), "lookup.provider.update", {
+      providerId: id,
+    });
+    return row;
   }
   @Delete("providers/:id")
   @RequireAbility("lookup:manage")
-  removeProvider(@Param("id") id: string) {
-    return this.policies.removeProvider(id);
+  async removeProvider(@Param("id") id: string, @Req() req: Request) {
+    const row = await this.policies.removeProvider(id);
+    void this.audit.log(this.actingId(req), "lookup.provider.delete", {
+      providerId: id,
+    });
+    return row;
   }
 
   @Post("policy-types")
   @RequireAbility("lookup:manage")
-  createType(@Body() dto: PolicyTypeDto) {
-    return this.policies.createPolicyType(dto);
+  async createType(@Body() dto: PolicyTypeDto, @Req() req: Request) {
+    const row = await this.policies.createPolicyType(dto);
+    void this.audit.log(this.actingId(req), "lookup.policyType.create", {
+      policyTypeId: row.id,
+      name: row.name,
+    });
+    return row;
   }
   @Patch("policy-types/:id")
   @RequireAbility("lookup:manage")
-  updateType(@Param("id") id: string, @Body() dto: UpdatePolicyTypeDto) {
-    return this.policies.updatePolicyType(id, dto);
+  async updateType(
+    @Param("id") id: string,
+    @Body() dto: UpdatePolicyTypeDto,
+    @Req() req: Request,
+  ) {
+    const row = await this.policies.updatePolicyType(id, dto);
+    void this.audit.log(this.actingId(req), "lookup.policyType.update", {
+      policyTypeId: id,
+    });
+    return row;
   }
   @Delete("policy-types/:id")
   @RequireAbility("lookup:manage")
-  removeType(@Param("id") id: string) {
-    return this.policies.removePolicyType(id);
+  async removeType(@Param("id") id: string, @Req() req: Request) {
+    const row = await this.policies.removePolicyType(id);
+    void this.audit.log(this.actingId(req), "lookup.policyType.delete", {
+      policyTypeId: id,
+    });
+    return row;
   }
 
   @Post("adjusters")
   @RequireAbility("lookup:manage")
-  createAdjuster(@Body() dto: AdjusterDto) {
-    return this.policies.createAdjuster(dto);
+  async createAdjuster(@Body() dto: AdjusterDto, @Req() req: Request) {
+    const row = await this.policies.createAdjuster(dto);
+    void this.audit.log(this.actingId(req), "lookup.adjuster.create", {
+      adjusterId: row.id,
+    });
+    return row;
   }
   @Patch("adjusters/:id")
   @RequireAbility("lookup:manage")
-  updateAdjuster(@Param("id") id: string, @Body() dto: UpdateAdjusterDto) {
-    return this.policies.updateAdjuster(id, dto);
+  async updateAdjuster(
+    @Param("id") id: string,
+    @Body() dto: UpdateAdjusterDto,
+    @Req() req: Request,
+  ) {
+    const row = await this.policies.updateAdjuster(id, dto);
+    void this.audit.log(this.actingId(req), "lookup.adjuster.update", {
+      adjusterId: id,
+    });
+    return row;
   }
   @Delete("adjusters/:id")
   @RequireAbility("lookup:manage")
-  removeAdjuster(@Param("id") id: string) {
-    return this.policies.removeAdjuster(id);
+  async removeAdjuster(@Param("id") id: string, @Req() req: Request) {
+    const row = await this.policies.removeAdjuster(id);
+    void this.audit.log(this.actingId(req), "lookup.adjuster.delete", {
+      adjusterId: id,
+    });
+    return row;
   }
 }
diff --git a/apps/web/src/app/banco/page.tsx b/apps/web/src/app/banco/page.tsx
index ff2794f..83028fb 100644
--- a/apps/web/src/app/banco/page.tsx
+++ b/apps/web/src/app/banco/page.tsx
@@ -3,11 +3,14 @@
 import { useCallback, useEffect, useRef, useState } from "react";
 import { AppShell } from "@/components/AppShell";
 import {
+  createBankMovement,
   getBankFacets,
   getBankStats,
   getBankSummary,
   listBankMovements,
+  voidBankMovement,
 } from "@/lib/api";
+import { useCan } from "@/lib/abilities";
 import {
   bankDirectionLabel,
   bankSourceLabel,
@@ -27,6 +30,7 @@ import type {
   BankStats,
   BankSummary,
   BankTotals,
+  CreateBankMovementInput,
 } from "@/lib/types";
 
 /**
@@ -77,6 +81,8 @@ export default function BancoPage() {
 }
 
 function BankBrowser() {
+  const canCapture = useCan("bank:create");
+  const canVoid = useCan("bank:void");
   const [stats, setStats] = useState<BankStats | null>(null);
   const [facets, setFacets] = useState<BankFacets | null>(null);
   const [view, setView] = useState<View>("movimientos");
@@ -93,6 +99,7 @@ function BankBrowser() {
   const [summaryYear, setSummaryYear] = useState<number | null>(null);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
+  const [captureOpen, setCaptureOpen] = useState(false);
 
   const debounceRef = useRef<ReturnType<typeof setTimeout>>();
 
@@ -237,8 +244,28 @@ function BankBrowser() {
             </button>
           ))}
         </div>
+        {view === "movimientos" && canCapture && (
+          <button
+            type="button"
+            className="btn btn-primary"
+            onClick={() => setCaptureOpen((v) => !v)}
+          >
+            {captureOpen ? "Cerrar captura" : "Capturar movimiento"}
+          </button>
+        )}
       </div>
 
+      {view === "movimientos" && captureOpen && (
+        <BankCaptureForm
+          onSaved={() => {
+            setCaptureOpen(false);
+            runSearch(movements?.page ?? 1);
+            getBankStats().then(setStats).catch(() => setStats(null));
+          }}
+          onCancel={() => setCaptureOpen(false)}
+        />
+      )}
+
       {view === "movimientos" && (
         <div className="filter-row">
           <label className="filter-field">
@@ -383,11 +410,26 @@ function BankBrowser() {
                     <th>Beneficiario / concepto</th>
                     <th>Origen</th>
                     <th className="num">Monto</th>
+                    {canVoid && (
+                      <th style={{ width: 1, whiteSpace: "nowrap" }}>
+                        Acciones
+                      </th>
+                    )}
                   </tr>
                 </thead>
                 <tbody>
                   {movements?.items.map((m) => (
-                    <BankRow key={m.id} m={m} />
+                    <BankRow
+                      key={m.id}
+                      m={m}
+                      canVoid={canVoid}
+                      onVoided={() => {
+                        runSearch(movements?.page ?? 1);
+                        getBankStats()
+                          .then(setStats)
+                          .catch(() => setStats(null));
+                      }}
+                    />
                   ))}
                 </tbody>
               </table>
@@ -524,17 +566,44 @@ function FilteredTotals({ totals }: { totals: BankTotals }) {
   );
 }
 
-function BankRow({ m }: { m: BankListItem }) {
+function BankRow({
+  m,
+  canVoid,
+  onVoided,
+}: {
+  m: BankListItem;
+  canVoid: boolean;
+  onVoided: () => void;
+}) {
+  const [busy, setBusy] = useState(false);
+
+  async function doVoid() {
+    if (
+      !window.confirm(
+        "¿Anular este movimiento? Quedará tachado y no contará en los totales.",
+      )
+    )
+      return;
+    setBusy(true);
+    try {
+      await voidBankMovement(m.id);
+      onVoided();
+    } catch (e) {
+      window.alert(
+        (e as Error)?.message ?? "No se pudo anular el movimiento.",
+      );
+      setBusy(false);
+    }
+  }
+
   return (
-    <tr>
+    <tr style={m.voided ? { textDecoration: "line-through", opacity: 0.55 } : undefined}>
       <td className="mono" style={{ whiteSpace: "nowrap" }}>
         {formatDate(m.transactionDate)}
       </td>
       <td className="tx-ref">
         {m.reference || "—"}
-        {!m.cleared && (
-          <div className="tx-concept">Sin operar</div>
-        )}
+        {!m.cleared && <div className="tx-concept">Sin operar</div>}
       </td>
       <td>
         {m.concept || <span className="muted">Sin concepto</span>}
@@ -547,6 +616,21 @@ function BankRow({ m }: { m: BankListItem }) {
         </span>
         <div className="tx-cur">{bankDirectionLabel(m.direction)}</div>
       </td>
+      {canVoid && (
+        <td style={{ whiteSpace: "nowrap" }}>
+          {!m.voided && (
+            <button
+              type="button"
+              className="btn btn-ghost"
+              style={{ padding: "4px 10px", fontSize: 12 }}
+              onClick={doVoid}
+              disabled={busy}
+            >
+              {busy ? "Anulando…" : "Anular"}
+            </button>
+          )}
+        </td>
+      )}
     </tr>
   );
 }
@@ -687,6 +771,198 @@ function SummaryView({
   );
 }
 
+/** Inline capture form for a single chequera movement. Single currency (MXN);
+ *  sign convention: positive = ingreso, negative = egreso. Booked rows are
+ *  never edited — fix mistakes with voidBankMovement + a fresh capture. */
+function BankCaptureForm({
+  onSaved,
+  onCancel,
+}: {
+  onSaved: () => void;
+  onCancel: () => void;
+}) {
+  const [direction, setDirection] = useState<BankDirection>("expense");
+  const [amount, setAmount] = useState("");
+  const [transactionDate, setTransactionDate] = useState(
+    new Date().toISOString().slice(0, 10),
+  );
+  const [concept, setConcept] = useState("");
+  const [reference, setReference] = useState("");
+  const [transactionType, setTransactionType] = useState("");
+  const [cleared, setCleared] = useState(true);
+  const [transferred, setTransferred] = useState(false);
+  const [notes, setNotes] = useState("");
+  const [amountInWords, setAmountInWords] = useState("");
+  const [saving, setSaving] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  function s(v: string): string | undefined {
+    const t = v.trim();
+    return t === "" ? undefined : t;
+  }
+
+  async function submit(e: React.FormEvent) {
+    e.preventDefault();
+    const abs = Number(amount);
+    if (!Number.isFinite(abs) || abs <= 0) {
+      setError("El monto debe ser un número mayor a cero.");
+      return;
+    }
+    const signed = direction === "income" ? Math.abs(abs) : -Math.abs(abs);
+    const payload: CreateBankMovementInput = {
+      amount: signed,
+      transactionDate,
+      concept: s(concept),
+      reference: s(reference),
+      transactionType: s(transactionType),
+      cleared,
+      transferred,
+      notes: s(notes),
+      amountInWords: s(amountInWords),
+    };
+    setSaving(true);
+    setError(null);
+    try {
+      await createBankMovement(payload);
+      onSaved();
+    } catch (e2) {
+      setError((e2 as Error)?.message ?? "No se pudo guardar el movimiento.");
+      setSaving(false);
+    }
+  }
+
+  return (
+    <form onSubmit={submit}>
+      {error && <div className="state-box state-error">{error}</div>}
+      <div className="card" style={{ padding: 20, marginBottom: 16 }}>
+        <h2 className="section-title" style={{ marginBottom: 14 }}>
+          Capturar movimiento de chequera
+        </h2>
+        <div className="form-grid">
+          <label className="field">
+            <span className="field-label">
+              Tipo <span aria-hidden>*</span>
+            </span>
+            <select
+              className="select"
+              value={direction}
+              onChange={(e) => setDirection(e.target.value as BankDirection)}
+            >
+              <option value="income">Ingreso</option>
+              <option value="expense">Egreso</option>
+            </select>
+          </label>
+          <label className="field">
+            <span className="field-label">
+              Fecha <span aria-hidden>*</span>
+            </span>
+            <input
+              className="input"
+              type="date"
+              required
+              value={transactionDate}
+              onChange={(e) => setTransactionDate(e.target.value)}
+            />
+          </label>
+          <label className="field">
+            <span className="field-label">
+              Monto (MXN) <span aria-hidden>*</span>
+            </span>
+            <input
+              className="input"
+              type="number"
+              step="0.01"
+              required
+              min="0"
+              value={amount}
+              onChange={(e) => setAmount(e.target.value)}
+              placeholder="0.00"
+            />
+          </label>
+          <label className="field">
+            <span className="field-label">Concepto</span>
+            <input
+              className="input"
+              value={concept}
+              onChange={(e) => setConcept(e.target.value)}
+              placeholder="Beneficiario o motivo"
+            />
+          </label>
+          <label className="field">
+            <span className="field-label">Referencia / cheque</span>
+            <input
+              className="input"
+              value={reference}
+              onChange={(e) => setReference(e.target.value)}
+            />
+          </label>
+          <label className="field">
+            <span className="field-label">Tipo en origen</span>
+            <input
+              className="input"
+              value={transactionType}
+              onChange={(e) => setTransactionType(e.target.value)}
+              placeholder="INGRESO / EGRESO"
+            />
+          </label>
+          <label className="field">
+            <span className="field-label">Monto en letras</span>
+            <input
+              className="input"
+              value={amountInWords}
+              onChange={(e) => setAmountInWords(e.target.value)}
+              placeholder="Ej. CIENTO CINCUENTA MIL PESOS 00/100"
+            />
+          </label>
+          <label
+            className="field"
+            style={{ flexDirection: "row", alignItems: "center", gap: 8 }}
+          >
+            <input
+              type="checkbox"
+              checked={cleared}
+              onChange={(e) => setCleared(e.target.checked)}
+            />
+            <span className="field-label" style={{ margin: 0 }}>
+              Operado por el banco
+            </span>
+          </label>
+          <label
+            className="field"
+            style={{ flexDirection: "row", alignItems: "center", gap: 8 }}
+          >
+            <input
+              type="checkbox"
+              checked={transferred}
+              onChange={(e) => setTransferred(e.target.checked)}
+            />
+            <span className="field-label" style={{ margin: 0 }}>
+              Transferencia
+            </span>
+          </label>
+        </div>
+        <label className="field" style={{ marginTop: 16 }}>
+          <span className="field-label">Notas</span>
+          <textarea
+            className="input"
+            rows={2}
+            value={notes}
+            onChange={(e) => setNotes(e.target.value)}
+          />
+        </label>
+      </div>
+      <div className="form-actions">
+        <button type="submit" className="btn btn-primary" disabled={saving}>
+          {saving ? "Guardando…" : "Capturar movimiento"}
+        </button>
+        <button type="button" className="btn btn-outline" onClick={onCancel}>
+          Cancelar
+        </button>
+      </div>
+    </form>
+  );
+}
+
 function Pager({
   page,
   pageCount,
diff --git a/apps/web/src/app/estado-cuenta/[id]/page.tsx b/apps/web/src/app/estado-cuenta/[id]/page.tsx
index e04391f..8455c50 100644
--- a/apps/web/src/app/estado-cuenta/[id]/page.tsx
+++ b/apps/web/src/app/estado-cuenta/[id]/page.tsx
@@ -3,7 +3,13 @@
 import { useEffect, useMemo, useState } from "react";
 import Link from "next/link";
 import { AppShell } from "@/components/AppShell";
-import { getStatement } from "@/lib/api";
+import { MovementForm } from "@/components/MovementForm";
+import {
+  getBillingFacets,
+  getStatement,
+  voidMovement,
+} from "@/lib/api";
+import { useCan } from "@/lib/abilities";
 import {
   balancePhrase,
   balanceTone,
@@ -17,6 +23,7 @@ import {
   txTypeLabel,
 } from "@/lib/labels";
 import type {
+  BillingFacets,
   LedgerCurrency,
   Statement,
   StatementMovement,
@@ -48,14 +55,18 @@ export default function EstadoCuentaDetailPage({
 }
 
 function StatementView({ id }: { id: string }) {
+  const canCapture = useCan("ledger:create");
+  const canVoid = useCan("ledger:void");
   const [data, setData] = useState<Statement | null>(null);
+  const [facets, setFacets] = useState<BillingFacets | null>(null);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
+  const [captureOpen, setCaptureOpen] = useState(false);
 
   const [currency, setCurrency] = useState<LedgerCurrency | null>(null);
   const [domain, setDomain] = useState<TransactionDomain | "">("");
 
-  useEffect(() => {
+  function reload() {
     let alive = true;
     setLoading(true);
     setError(null);
@@ -63,9 +74,10 @@ function StatementView({ id }: { id: string }) {
       .then((d) => {
         if (!alive) return;
         setData(d);
-        // Default to the currency the customer actually moves the most in.
+        // Default to the currency the customer actually moves the most in;
+        // preserve a previously-chosen currency across reloads.
         const busiest = [...d.summary].sort((a, b) => b.count - a.count)[0];
-        setCurrency(busiest?.currency ?? "MXN");
+        setCurrency((prev) => prev ?? busiest?.currency ?? "MXN");
         setLoading(false);
       })
       .catch((e) => {
@@ -80,6 +92,13 @@ function StatementView({ id }: { id: string }) {
     return () => {
       alive = false;
     };
+  }
+
+  useEffect(() => {
+    const cleanup = reload();
+    getBillingFacets().then(setFacets).catch(() => setFacets(null));
+    return cleanup;
+    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [id]);
 
   const movements = useMemo(() => {
@@ -178,8 +197,35 @@ function StatementView({ id }: { id: string }) {
           title="Movimientos"
           count={movements.length}
           countSuffix={movements.length === 1 ? "movimiento" : "movimientos"}
+          right={
+            canCapture ? (
+              <button
+                type="button"
+                className="btn btn-primary"
+                onClick={() => setCaptureOpen((v) => !v)}
+              >
+                {captureOpen ? "Cerrar captura" : "Capturar movimiento"}
+              </button>
+            ) : undefined
+          }
         />
 
+        {captureOpen && (
+          <MovementForm
+            concepts={facets?.types ?? []}
+            defaultCurrency={currency ?? "MXN"}
+            defaultCustomer={{
+              id: data.customer.id,
+              name: data.customer.name,
+            }}
+            onSaved={() => {
+              setCaptureOpen(false);
+              reload();
+            }}
+            onCancel={() => setCaptureOpen(false)}
+          />
+        )}
+
         <div className="filter-row">
           <label className="filter-field">
             <span className="filter-label">Moneda</span>
@@ -228,11 +274,21 @@ function StatementView({ id }: { id: string }) {
                     <th>Referencia</th>
                     <th className="num">Cargo / Abono</th>
                     <th className="num">Saldo</th>
+                    {canVoid && (
+                      <th style={{ width: 1, whiteSpace: "nowrap" }}>
+                        Acciones
+                      </th>
+                    )}
                   </tr>
                 </thead>
                 <tbody>
                   {movements.map((m) => (
-                    <StatementRow key={m.id} m={m} />
+                    <StatementRow
+                      key={m.id}
+                      m={m}
+                      canVoid={canVoid}
+                      onVoided={reload}
+                    />
                   ))}
                 </tbody>
               </table>
@@ -425,10 +481,39 @@ function ConceptosSection({
   );
 }
 
-function StatementRow({ m }: { m: StatementMovement }) {
+function StatementRow({
+  m,
+  canVoid,
+  onVoided,
+}: {
+  m: StatementMovement;
+  canVoid: boolean;
+  onVoided: () => void;
+}) {
   const concept = m.message || m.period || null;
+  const [busy, setBusy] = useState(false);
+
+  async function doVoid() {
+    if (
+      !window.confirm(
+        "¿Anular este movimiento? Quedará tachado y no contará en los totales.",
+      )
+    )
+      return;
+    setBusy(true);
+    try {
+      await voidMovement(m.id);
+      onVoided();
+    } catch (e) {
+      window.alert(
+        (e as Error)?.message ?? "No se pudo anular el movimiento.",
+      );
+      setBusy(false);
+    }
+  }
+
   return (
-    <tr>
+    <tr style={m.voided ? { textDecoration: "line-through", opacity: 0.55 } : undefined}>
       <td className="mono" style={{ whiteSpace: "nowrap" }}>
         {formatDate(m.transactionDate)}
       </td>
@@ -455,6 +540,21 @@ function StatementRow({ m }: { m: StatementMovement }) {
           {formatMoney(m.balanceAfter, m.currency)}
         </span>
       </td>
+      {canVoid && (
+        <td style={{ whiteSpace: "nowrap" }}>
+          {!m.voided && (
+            <button
+              type="button"
+              className="btn btn-ghost"
+              style={{ padding: "4px 10px", fontSize: 12 }}
+              onClick={doVoid}
+              disabled={busy}
+            >
+              {busy ? "Anulando…" : "Anular"}
+            </button>
+          )}
+        </td>
+      )}
     </tr>
   );
 }
@@ -464,14 +564,23 @@ function SectionHead({
   title,
   count,
   countSuffix,
+  right,
 }: {
   rule: string;
   title: string;
   count?: number;
   countSuffix?: string;
+  right?: React.ReactNode;
 }) {
   return (
-    <div className="section-head">
+    <div
+      className="section-head"
+      style={
+        right
+          ? { display: "flex", alignItems: "center", gap: 12, flexWrap: "wrap" }
+          : undefined
+      }
+    >
       <span className={`section-rule ${rule}`} aria-hidden />
       <h2 className="section-title">{title}</h2>
       {count != null && (
@@ -479,6 +588,9 @@ function SectionHead({
           {formatNumber(count)} {countSuffix ?? ""}
         </span>
       )}
+      {right && (
+        <div style={{ marginLeft: "auto" }}>{right}</div>
+      )}
     </div>
   );
 }
diff --git a/apps/web/src/app/estado-cuenta/page.tsx b/apps/web/src/app/estado-cuenta/page.tsx
index d09302e..853508c 100644
--- a/apps/web/src/app/estado-cuenta/page.tsx
+++ b/apps/web/src/app/estado-cuenta/page.tsx
@@ -3,12 +3,15 @@
 import { useCallback, useEffect, useRef, useState } from "react";
 import Link from "next/link";
 import { AppShell } from "@/components/AppShell";
+import { MovementForm } from "@/components/MovementForm";
 import {
   getBillingFacets,
   getBillingStats,
   listBalances,
   listMovements,
+  voidMovement,
 } from "@/lib/api";
+import { useCan } from "@/lib/abilities";
 import {
   balancePhrase,
   balanceTone,
@@ -95,6 +98,8 @@ export default function EstadoCuentaPage() {
 }
 
 function BillingBrowser() {
+  const canCapture = useCan("ledger:create");
+  const canVoid = useCan("ledger:void");
   const [stats, setStats] = useState<BillingStats | null>(null);
   const [facets, setFacets] = useState<BillingFacets | null>(null);
   const [view, setView] = useState<View>("saldos");
@@ -119,6 +124,7 @@ function BillingBrowser() {
   const [movements, setMovements] = useState<MovementListResponse | null>(null);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
+  const [captureOpen, setCaptureOpen] = useState(false);
 
   const debounceRef = useRef<ReturnType<typeof setTimeout>>();
 
@@ -287,8 +293,38 @@ function BillingBrowser() {
             </button>
           ))}
         </div>
+        {view === "movimientos" && canCapture && (
+          <button
+            type="button"
+            className="btn btn-primary"
+            onClick={() => setCaptureOpen((v) => !v)}
+          >
+            {captureOpen ? "Cerrar captura" : "Capturar movimiento"}
+          </button>
+        )}
       </div>
 
+      {view === "movimientos" && captureOpen && (
+        <section className="section">
+          <div className="section-head">
+            <span className="section-rule cuenta" aria-hidden />
+            <h2 className="section-title">Capturar movimiento</h2>
+          </div>
+          <MovementForm
+            concepts={facets?.types ?? []}
+            defaultCurrency={currency}
+            onSaved={() => {
+              setCaptureOpen(false);
+              runSearch(movements?.page ?? 1);
+              getBillingStats()
+                .then(setStats)
+                .catch(() => setStats(null));
+            }}
+            onCancel={() => setCaptureOpen(false)}
+          />
+        </section>
+      )}
+
       <div className="filter-row">
         <label className="filter-field">
           <span className="filter-label">Moneda</span>
@@ -506,11 +542,22 @@ function BillingBrowser() {
                     <th>Concepto</th>
                     <th>Referencia</th>
                     <th className="num">Monto</th>
+                    {canVoid && <th style={{ width: 1, whiteSpace: "nowrap" }}>Acciones</th>}
                   </tr>
                 </thead>
                 <tbody>
                   {movements?.items.map((m) => (
-                    <MovementRow key={m.id} m={m} />
+                    <MovementRow
+                      key={m.id}
+                      m={m}
+                      canVoid={canVoid}
+                      onVoided={() => {
+                        runSearch(movements?.page ?? 1);
+                        getBillingStats()
+                          .then(setStats)
+                          .catch(() => setStats(null));
+                      }}
+                    />
                   ))}
                 </tbody>
               </table>
@@ -739,9 +786,32 @@ function BalanceRow({
   );
 }
 
-function MovementRow({ m }: { m: MovementListItem }) {
+function MovementRow({
+  m,
+  canVoid,
+  onVoided,
+}: {
+  m: MovementListItem;
+  canVoid: boolean;
+  onVoided: () => void;
+}) {
+  const [busy, setBusy] = useState(false);
+
+  async function doVoid() {
+    if (!window.confirm("¿Anular este movimiento? Quedará tachado y no contará en los totales."))
+      return;
+    setBusy(true);
+    try {
+      await voidMovement(m.id);
+      onVoided();
+    } catch (e) {
+      window.alert((e as Error)?.message ?? "No se pudo anular el movimiento.");
+      setBusy(false);
+    }
+  }
+
   return (
-    <tr>
+    <tr style={m.voided ? { textDecoration: "line-through", opacity: 0.55 } : undefined}>
       <td className="mono" style={{ whiteSpace: "nowrap" }}>
         {formatDate(m.transactionDate)}
       </td>
@@ -776,6 +846,21 @@ function MovementRow({ m }: { m: MovementListItem }) {
           {m.currency} · {directionLabel(m.direction)}
         </div>
       </td>
+      {canVoid && (
+        <td style={{ whiteSpace: "nowrap" }}>
+          {!m.voided && (
+            <button
+              type="button"
+              className="btn btn-ghost"
+              style={{ padding: "4px 10px", fontSize: 12 }}
+              onClick={doVoid}
+              disabled={busy}
+            >
+              {busy ? "Anulando…" : "Anular"}
+            </button>
+          )}
+        </td>
+      )}
     </tr>
   );
 }
diff --git a/apps/web/src/components/MovementForm.tsx b/apps/web/src/components/MovementForm.tsx
new file mode 100644
index 0000000..a7b9dbf
--- /dev/null
+++ b/apps/web/src/components/MovementForm.tsx
@@ -0,0 +1,260 @@
+"use client";
+
+import { useState } from "react";
+import { CustomerPicker } from "@/components/CustomerPicker";
+import { createMovement } from "@/lib/api";
+import type {
+  CreateMovementInput,
+  Currency,
+  Facet,
+  LedgerCurrency,
+  TransactionDomain,
+} from "@/lib/types";
+
+const DOMAINS: { key: TransactionDomain; label: string }[] = [
+  { key: "UTILITY", label: "Servicios" },
+  { key: "INSURANCE", label: "Seguros" },
+  { key: "TRUST", label: "Fideicomiso" },
+];
+
+type Direction = "charge" | "credit";
+
+function today(): string {
+  return new Date().toISOString().slice(0, 10);
+}
+
+function s(v: string): string | undefined {
+  const t = v.trim();
+  return t === "" ? undefined : t;
+}
+
+/** Capture form for one ledger movement. `defaultCustomer` pre-fills the picker
+ *  when opening from a customer's statement. `concepts` is the list of
+ *  transaction-type facets from the billing module. */
+export function MovementForm({
+  concepts,
+  defaultCurrency,
+  defaultCustomer,
+  defaultDomain,
+  onSaved,
+  onCancel,
+}: {
+  concepts: Facet[];
+  defaultCurrency?: LedgerCurrency;
+  defaultCustomer?: { id: string; name: string };
+  defaultDomain?: TransactionDomain;
+  onSaved: () => void;
+  onCancel: () => void;
+}) {
+  const [customerId, setCustomerId] = useState(defaultCustomer?.id ?? "");
+  const [customerName, setCustomerName] = useState(defaultCustomer?.name ?? "");
+  const [domain, setDomain] = useState<TransactionDomain>(
+    defaultDomain ?? "UTILITY",
+  );
+  const [direction, setDirection] = useState<Direction>("charge");
+  const [amount, setAmount] = useState("");
+  const [transactionDate, setTransactionDate] = useState(today());
+  const [currency, setCurrency] = useState<LedgerCurrency>(
+    defaultCurrency ?? "MXN",
+  );
+  const [typeId, setTypeId] = useState("");
+  const [period, setPeriod] = useState("");
+  const [reference, setReference] = useState("");
+  const [checkNumber, setCheckNumber] = useState("");
+  const [message, setMessage] = useState("");
+  const [saving, setSaving] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  async function submit(e: React.FormEvent) {
+    e.preventDefault();
+    if (!customerId) {
+      setError("Selecciona un cliente.");
+      return;
+    }
+    const abs = Number(amount);
+    if (!Number.isFinite(abs) || abs === 0) {
+      setError("El monto debe ser un número distinto de cero.");
+      return;
+    }
+    const signed = direction === "charge" ? -Math.abs(abs) : Math.abs(abs);
+    const payload: CreateMovementInput = {
+      customerId,
+      domain,
+      amount: signed,
+      transactionDate,
+      currency: currency as Currency,
+      typeId: s(typeId),
+      period: s(period),
+      reference: s(reference),
+      checkNumber: s(checkNumber),
+      message: s(message),
+    };
+    setSaving(true);
+    setError(null);
+    try {
+      await createMovement(payload);
+      onSaved();
+    } catch (e2) {
+      setError((e2 as Error)?.message ?? "No se pudo guardar el movimiento.");
+      setSaving(false);
+    }
+  }
+
+  return (
+    <form onSubmit={submit}>
+      {error && <div className="state-box state-error">{error}</div>}
+
+      <div className="card" style={{ padding: 20, marginBottom: 16 }}>
+        <h2 className="section-title" style={{ marginBottom: 14 }}>Cliente</h2>
+        <CustomerPicker
+          value={customerId}
+          valueName={customerId ? customerName : undefined}
+          onPick={(id, name) => {
+            setCustomerId(id);
+            setCustomerName(name);
+          }}
+        />
+      </div>
+
+      <div className="card" style={{ padding: 20, marginBottom: 16 }}>
+        <h2 className="section-title" style={{ marginBottom: 14 }}>Movimiento</h2>
+        <div className="form-grid">
+          <Field label="Línea de negocio" required>
+            <select
+              className="select"
+              value={domain}
+              onChange={(e) => setDomain(e.target.value as TransactionDomain)}
+            >
+              {DOMAINS.map((d) => (
+                <option key={d.key} value={d.key}>
+                  {d.label}
+                </option>
+              ))}
+            </select>
+          </Field>
+          <Field label="Fecha" required>
+            <input
+              className="input"
+              type="date"
+              required
+              value={transactionDate}
+              onChange={(e) => setTransactionDate(e.target.value)}
+            />
+          </Field>
+          <Field label="Tipo" required>
+            <select
+              className="select"
+              value={direction}
+              onChange={(e) => setDirection(e.target.value as Direction)}
+            >
+              <option value="charge">Cargo</option>
+              <option value="credit">Abono</option>
+            </select>
+          </Field>
+          <Field label="Monto" required>
+            <input
+              className="input"
+              type="number"
+              step="0.01"
+              required
+              min="0"
+              value={amount}
+              onChange={(e) => setAmount(e.target.value)}
+              placeholder="0.00"
+            />
+          </Field>
+          <Field label="Moneda" required>
+            <select
+              className="select"
+              value={currency}
+              onChange={(e) => setCurrency(e.target.value as LedgerCurrency)}
+            >
+              <option value="MXN">Pesos (MXN)</option>
+              <option value="USD">Dólares (USD)</option>
+            </select>
+          </Field>
+          <Field label="Concepto">
+            <select
+              className="select"
+              value={typeId}
+              onChange={(e) => setTypeId(e.target.value)}
+            >
+              <option value="">(sin concepto)</option>
+              {concepts.map((t) => (
+                <option key={t.id} value={t.id}>
+                  {t.name}
+                </option>
+              ))}
+            </select>
+          </Field>
+        </div>
+      </div>
+
+      <div className="card" style={{ padding: 20, marginBottom: 16 }}>
+        <h2 className="section-title" style={{ marginBottom: 14 }}>Detalles</h2>
+        <div className="form-grid">
+          <Field label="Periodo">
+            <input
+              className="input"
+              value={period}
+              onChange={(e) => setPeriod(e.target.value)}
+              placeholder="Ej. 2025-01"
+            />
+          </Field>
+          <Field label="Referencia">
+            <input
+              className="input"
+              value={reference}
+              onChange={(e) => setReference(e.target.value)}
+            />
+          </Field>
+          <Field label="Número de cheque">
+            <input
+              className="input"
+              value={checkNumber}
+              onChange={(e) => setCheckNumber(e.target.value)}
+            />
+          </Field>
+        </div>
+        <label className="field" style={{ marginTop: 16 }}>
+          <span className="field-label">Mensaje</span>
+          <textarea
+            className="input"
+            rows={2}
+            value={message}
+            onChange={(e) => setMessage(e.target.value)}
+          />
+        </label>
+      </div>
+
+      <div className="form-actions">
+        <button type="submit" className="btn btn-primary" disabled={saving}>
+          {saving ? "Guardando…" : "Capturar movimiento"}
+        </button>
+        <button type="button" className="btn btn-outline" onClick={onCancel}>
+          Cancelar
+        </button>
+      </div>
+    </form>
+  );
+}
+
+function Field({
+  label,
+  required,
+  children,
+}: {
+  label: string;
+  required?: boolean;
+  children: React.ReactNode;
+}) {
+  return (
+    <label className="field">
+      <span className="field-label">
+        {label}
+        {required && <span aria-hidden> *</span>}
+      </span>
+      {children}
+    </label>
+  );
+}
diff --git a/apps/web/src/lib/api.ts b/apps/web/src/lib/api.ts
index 1289175..4006377 100644
--- a/apps/web/src/lib/api.ts
+++ b/apps/web/src/lib/api.ts
@@ -16,6 +16,8 @@ import type {
   BillingFacets,
   BillingStats,
   BusinessLine,
+  CreateBankMovementInput,
+  CreateMovementInput,
   CustomerDetail,
   CustomerInput,
   CustomerListResponse,
@@ -43,6 +45,7 @@ import type {
   Role,
   ServiceKind,
   Statement,
+  Transaction,
   TransactionDomain,
   TrustFilter,
   UserRow,
@@ -477,6 +480,22 @@ export function getStatement(customerId: string): Promise<Statement> {
   return apiFetch<Statement>(`/billing/customers/${customerId}`);
 }
 
+/** Append a new ledger movement. Booked movements are never edited — fix
+ *  mistakes with voidMovement + a fresh capture. */
+export function createMovement(
+  input: CreateMovementInput,
+): Promise<Transaction> {
+  return apiFetch<Transaction>("/billing", {
+    method: "POST",
+    body: JSON.stringify(input),
+  });
+}
+
+/** Reverse a movement by marking it voided; totals drop it. 400 if already void. */
+export function voidMovement(id: string): Promise<Transaction> {
+  return apiFetch<Transaction>(`/billing/${id}/void`, { method: "POST" });
+}
+
 /* ------------------------------------------------- Bank register (chequera) */
 
 export interface BankQuery {
@@ -517,6 +536,22 @@ export function getBankSummary(year?: number): Promise<BankSummary> {
   return apiFetch<BankSummary>(`/bank/summary${year ? `?year=${year}` : ""}`);
 }
 
+/** Append a new chequera movement. Booked rows are never edited — fix mistakes
+ *  with voidBankMovement + a fresh capture. */
+export function createBankMovement(
+  input: CreateBankMovementInput,
+): Promise<unknown> {
+  return apiFetch("/bank", {
+    method: "POST",
+    body: JSON.stringify(input),
+  });
+}
+
+/** Reverse a chequera movement by marking it voided; totals drop it. */
+export function voidBankMovement(id: string): Promise<unknown> {
+  return apiFetch(`/bank/${id}/void`, { method: "POST" });
+}
+
 /* ------------------------------------------------- Users / administration */
 
 export function listUsers(): Promise<UserRow[]> {
diff --git a/apps/web/src/lib/types.ts b/apps/web/src/lib/types.ts
index a34efec..2cb9a18 100644
--- a/apps/web/src/lib/types.ts
+++ b/apps/web/src/lib/types.ts
@@ -683,6 +683,23 @@ export interface Movement {
   /** Legacy table the row came from — `datos2`, `EFECTIVO`, `fee15`, … */
   source: string | null;
   type: TransactionType | null;
+  /** App-voided (`voidedAt` set). UI strikes; totals exclude. */
+  voided: boolean;
+}
+
+/** Payload for POST /billing — a new ledger movement. Sign convention: negative
+ *  = cargo (charge), positive = abono (credit). */
+export interface CreateMovementInput {
+  customerId: string;
+  domain: TransactionDomain;
+  amount: number;
+  transactionDate: string;
+  currency?: Currency;
+  typeId?: string;
+  period?: string;
+  reference?: string;
+  checkNumber?: string;
+  message?: string;
 }
 
 export interface MovementListItem extends Movement {
@@ -909,6 +926,22 @@ export interface BankListItem {
   /** "CIENTO CINCUENTA MIL PESOS 00/100" — egresos only. */
   amountInWords: string | null;
   source: string | null;
+  /** App-voided (`voidedAt` set). UI strikes; totals exclude. */
+  voided: boolean;
+}
+
+/** Payload for POST /bank — a new chequera movement. Sign convention: positive
+ *  = ingreso, negative = egreso. MXN only. */
+export interface CreateBankMovementInput {
+  amount: number;
+  transactionDate: string;
+  concept?: string;
+  reference?: string;
+  transactionType?: string;
+  cleared?: boolean;
+  transferred?: boolean;
+  notes?: string;
+  amountInWords?: string;
 }
 
 export interface BankTotals {