diff --git a/apps/edr-freight-api/src/modules/eims/dto/bulk-cancel-eims-registration.dto.ts b/apps/edr-freight-api/src/modules/eims/dto/bulk-cancel-eims-registration.dto.ts
new file mode 100644
index 000000000..c4782782c
--- /dev/null
+++ b/apps/edr-freight-api/src/modules/eims/dto/bulk-cancel-eims-registration.dto.ts
@@ -0,0 +1,33 @@
+import { ApiProperty, ApiPropertyOptional } from "@nestjs/swagger";
+import { Type } from "class-transformer";
+import { ArrayMinSize, IsArray, IsOptional, IsString, IsUUID, Length, ValidateNested } from "class-validator";
+
+export class BulkCancelEimsItemDto {
+  @ApiProperty({ description: "Invoice ID to cancel." })
+  @IsUUID()
+  invoiceId!: string;
+
+  @ApiProperty({
+    description: 'Numeric reason code, e.g. "1" (Duplicate), "6" (Calculation Error).',
+    example: "1",
+  })
+  @IsString()
+  @Length(1, 8)
+  reasonCode!: string;
+
+  @ApiPropertyOptional({ description: "Free-text cancellation note.", example: "Duplicate submission" })
+  @IsOptional()
+  @IsString()
+  @Length(0, 500)
+  remark?: string;
+}
+
+/** `POST invoices/eims/bulk-cancel` body — see `EimsCancellationService.cancelBulkWithEims`. */
+export class BulkCancelEimsRegistrationDto {
+  @ApiProperty({ type: [BulkCancelEimsItemDto] })
+  @IsArray()
+  @ArrayMinSize(1)
+  @ValidateNested({ each: true })
+  @Type(() => BulkCancelEimsItemDto)
+  items!: BulkCancelEimsItemDto[];
+}
diff --git a/apps/edr-freight-api/src/modules/eims/eims-cancellation.service.spec.ts b/apps/edr-freight-api/src/modules/eims/eims-cancellation.service.spec.ts
index 6bd9b04b3..b9fdf62df 100644
--- a/apps/edr-freight-api/src/modules/eims/eims-cancellation.service.spec.ts
+++ b/apps/edr-freight-api/src/modules/eims/eims-cancellation.service.spec.ts
@@ -9,7 +9,9 @@ import { EimsApiException } from "./eims.errors";
 import { EimsInvoiceStatus } from "./eims-registration.types";
 
 const INVOICE_ID = "11111111-1111-4111-8111-111111111111";
+const OTHER_INVOICE_ID = "22222222-2222-4222-8222-222222222222";
 const IRN = "9fe9bbbece6ab76c112b617534e6aac7aa8b819d5be79f4d3d088ed2e887b2e0";
+const OTHER_IRN = "0af579eaef6f1e2d39fa77bd21cf8ecc64e26869275ae1c04eaa9ffea78b6c06";
 
 const invoiceRow = (over: Partial<Invoice> = {}): Invoice =>
   ({
@@ -153,3 +155,105 @@ describe("EimsCancellationService.cancelInvoiceWithEims", () => {
     expect(view.eimsStatus).toBe(EimsInvoiceStatus.Cancelled);
   });
 });
+
+describe("EimsCancellationService.cancelBulkWithEims", () => {
+  it("cancels every eligible invoice in one call, matching results back by IRN", async () => {
+    const db = new FakeDb([invoiceRow(), invoiceRow({ id: OTHER_INVOICE_ID, eimsIrn: OTHER_IRN })]);
+    const postBearer = jest.fn().mockResolvedValue({
+      statusCode: 200,
+      body: [
+        { id: 1, tin: "t", status: "C", mode: "bulk", Irn: OTHER_IRN, ReasonCode: "6", Remark: "x" },
+        { id: 2, tin: "t", status: "C", mode: "bulk", Irn: IRN, ReasonCode: "1", Remark: "" },
+      ],
+    });
+
+    const results = await build(db, postBearer).cancelBulkWithEims([
+      { invoiceId: INVOICE_ID, reasonCode: "1" },
+      { invoiceId: OTHER_INVOICE_ID, reasonCode: "6", remark: "x" },
+    ]);
+
+    expect(postBearer).toHaveBeenCalledWith("/v1/bulkCancel", [
+      { Irn: IRN, ReasonCode: "1", Remark: "" },
+      { Irn: OTHER_IRN, ReasonCode: "6", Remark: "x" },
+    ]);
+    expect(results).toEqual([
+      { invoiceId: INVOICE_ID, success: true, message: expect.stringContaining("cancelled") },
+      { invoiceId: OTHER_INVOICE_ID, success: true, message: expect.stringContaining("cancelled") },
+    ]);
+    expect(db.invoices.get(INVOICE_ID)?.eimsStatus).toBe(EimsInvoiceStatus.Cancelled);
+    expect(db.invoices.get(OTHER_INVOICE_ID)?.eimsStatus).toBe(EimsInvoiceStatus.Cancelled);
+    // Bulk success carries no cancellationDate at all, unlike single cancel.
+    expect(db.invoices.get(INVOICE_ID)?.eimsCancellationDate).toBeNull();
+  });
+
+  it("refuses an already-cancelled or never-registered invoice locally — never sent to MoR", async () => {
+    const db = new FakeDb([
+      invoiceRow({ eimsStatus: EimsInvoiceStatus.Cancelled }),
+      invoiceRow({ id: OTHER_INVOICE_ID, eimsStatus: EimsInvoiceStatus.NotSubmitted, eimsIrn: null }),
+    ]);
+    const postBearer = jest.fn();
+
+    const results = await build(db, postBearer).cancelBulkWithEims([
+      { invoiceId: INVOICE_ID, reasonCode: "1" },
+      { invoiceId: OTHER_INVOICE_ID, reasonCode: "1" },
+    ]);
+
+    expect(postBearer).not.toHaveBeenCalled();
+    expect(results).toEqual([
+      { invoiceId: INVOICE_ID, success: false, message: expect.stringContaining("already cancelled") },
+      { invoiceId: OTHER_INVOICE_ID, success: false, message: expect.stringContaining("never registered") },
+    ]);
+  });
+
+  it("a mix of MoR success and rejection only updates the succeeding invoice", async () => {
+    const db = new FakeDb([invoiceRow(), invoiceRow({ id: OTHER_INVOICE_ID, eimsIrn: OTHER_IRN })]);
+    const postBearer = jest.fn().mockResolvedValue({
+      statusCode: 200,
+      body: [
+        { id: 1, tin: "t", status: "C", mode: "bulk", Irn: IRN, ReasonCode: "1", Remark: "" },
+        { Status: "Processing_Error", msg: "IRN already Canceled.", Irn: OTHER_IRN },
+      ],
+    });
+
+    const results = await build(db, postBearer).cancelBulkWithEims([
+      { invoiceId: INVOICE_ID, reasonCode: "1" },
+      { invoiceId: OTHER_INVOICE_ID, reasonCode: "1" },
+    ]);
+
+    expect(db.invoices.get(INVOICE_ID)?.eimsStatus).toBe(EimsInvoiceStatus.Cancelled);
+    expect(db.invoices.get(OTHER_INVOICE_ID)?.eimsStatus).toBe(EimsInvoiceStatus.Registered);
+    expect(results).toEqual([
+      { invoiceId: INVOICE_ID, success: true, message: expect.stringContaining("cancelled") },
+      { invoiceId: OTHER_INVOICE_ID, success: false, message: "IRN already Canceled." },
+    ]);
+  });
+
+  it("makes no HTTP call at all when every item fails the local eligibility check", async () => {
+    const db = new FakeDb([invoiceRow({ eimsStatus: EimsInvoiceStatus.Cancelled })]);
+    const postBearer = jest.fn();
+
+    await build(db, postBearer).cancelBulkWithEims([{ invoiceId: INVOICE_ID, reasonCode: "1" }]);
+
+    expect(postBearer).not.toHaveBeenCalled();
+  });
+
+  it("notifies the buyer only for invoices that actually got cancelled", async () => {
+    const db = new FakeDb([invoiceRow(), invoiceRow({ id: OTHER_INVOICE_ID, eimsIrn: OTHER_IRN })]);
+    db.companyContact = { phone: "+251911000000", email: null };
+    const directSend = jest.fn().mockResolvedValue(undefined);
+    const postBearer = jest.fn().mockResolvedValue({
+      statusCode: 200,
+      body: [
+        { status: "C", Irn: IRN },
+        { Status: "Processing_Error", msg: "boom", Irn: OTHER_IRN },
+      ],
+    });
+
+    await build(db, postBearer, directSend).cancelBulkWithEims([
+      { invoiceId: INVOICE_ID, reasonCode: "1" },
+      { invoiceId: OTHER_INVOICE_ID, reasonCode: "1" },
+    ]);
+
+    expect(directSend).toHaveBeenCalledTimes(1);
+  });
+});
diff --git a/apps/edr-freight-api/src/modules/eims/eims-cancellation.service.ts b/apps/edr-freight-api/src/modules/eims/eims-cancellation.service.ts
index 9aa525ae3..7f8605c5f 100644
--- a/apps/edr-freight-api/src/modules/eims/eims-cancellation.service.ts
+++ b/apps/edr-freight-api/src/modules/eims/eims-cancellation.service.ts
@@ -6,7 +6,15 @@ import { Invoice } from "../billing/entities/invoice.entity";
 import { NotificationsService } from "../notifications/notifications.service";
 import { sendCompanyChannels } from "../notifications/notify-company.util";
 import { EimsClientService } from "./eims-client.service";
-import { EimsCancelRequest, EimsCancelResponse, EimsInvoiceStatus, EimsInvoiceStatusView } from "./eims-registration.types";
+import {
+  EimsBulkCancelItemResult,
+  EimsBulkCancelRequest,
+  EimsBulkCancelResponse,
+  EimsCancelRequest,
+  EimsCancelResponse,
+  EimsInvoiceStatus,
+  EimsInvoiceStatusView,
+} from "./eims-registration.types";
 import { toEimsInvoiceStatusView } from "./eims-invoice-view.util";
 
 /**
@@ -92,6 +100,102 @@ export class EimsCancellationService {
     return this.getEimsCancellationStatus(invoiceId);
   }
 
+  /**
+   * `POST /v1/bulkCancel` — one MoR call for every eligible invoice in `items`, matching the
+   * collection's own shape (an array in, an array of mixed success/error results back).
+   *
+   * Same local-eligibility doctrine as `cancelInvoiceWithEims`, applied per item before anything
+   * goes to MoR: an already-cancelled or never-registered invoice is refused right here (no HTTP
+   * call, no seat in the batch) rather than sent and rejected remotely. Only genuinely eligible
+   * invoices are batched into the one `/v1/bulkCancel` request; everything else is reported back
+   * immediately.
+   *
+   * ponytail: the eligibility pass is per-invoice transactions, not one covering the whole batch —
+   * same reasoning as the single-cancel path (cancel is idempotent at MoR, so a lock held across
+   * every item for the whole call isn't needed for correctness, only for avoiding a wasted call on
+   * an item that's already ineligible).
+   */
+  async cancelBulkWithEims(
+    items: Array<{ invoiceId: string; reasonCode: string; remark?: string }>,
+  ): Promise<EimsBulkCancelItemResult[]> {
+    const results = new Map<string, EimsBulkCancelItemResult>();
+    const eligible: Array<{ invoice: Invoice; reasonCode: string; remark?: string }> = [];
+
+    for (const item of items) {
+      try {
+        const invoice = await this.dataSource.transaction(async (manager) => {
+          const inv = await this.lockInvoice(manager, item.invoiceId);
+          if (inv.eimsStatus === EimsInvoiceStatus.Cancelled) {
+            throw new ConflictException(
+              `Invoice ${inv.invoiceNumber} was already cancelled with EIMS${inv.eimsCancellationDate ? ` (${inv.eimsCancellationDate})` : ""}.`,
+            );
+          }
+          if (!inv.eimsIrn) {
+            throw new BadRequestException(
+              `Invoice ${inv.invoiceNumber} was never registered with EIMS — nothing to cancel.`,
+            );
+          }
+          return inv;
+        });
+        eligible.push({ invoice, reasonCode: item.reasonCode, remark: item.remark });
+      } catch (err) {
+        results.set(item.invoiceId, {
+          invoiceId: item.invoiceId,
+          success: false,
+          message: (err as Error).message,
+        });
+      }
+    }
+
+    if (eligible.length > 0) {
+      const request: EimsBulkCancelRequest = eligible.map((e) => ({
+        Irn: e.invoice.eimsIrn!,
+        ReasonCode: e.reasonCode,
+        Remark: e.remark ?? "",
+      }));
+      // Outside any transaction — no DB lock held across the wire, same as single cancel.
+      const response = await this.client.postBearer<EimsBulkCancelRequest, EimsBulkCancelResponse>(
+        "/v1/bulkCancel",
+        request,
+      );
+      const byIrn = new Map((response?.body ?? []).map((entry) => [entry.Irn, entry]));
+
+      for (const { invoice, reasonCode, remark } of eligible) {
+        const entry = byIrn.get(invoice.eimsIrn!);
+        const failed = !entry || "Status" in entry;
+        if (failed) {
+          const message = entry && "msg" in entry ? entry.msg : "EIMS bulk cancel returned no result for this invoice.";
+          this.logger.warn(`Invoice ${invoice.invoiceNumber} bulk cancel failed: ${message}`);
+          results.set(invoice.id, { invoiceId: invoice.id, success: false, message });
+          continue;
+        }
+
+        await this.dataSource.transaction(async (manager) => {
+          const fresh = await this.lockInvoice(manager, invoice.id);
+          // Re-checked under lock: a concurrent call may have already recorded this cancellation.
+          if (fresh.eimsStatus === EimsInvoiceStatus.Cancelled) return;
+          await manager.update(Invoice, invoice.id, {
+            eimsStatus: EimsInvoiceStatus.Cancelled,
+            eimsCancelledAt: new Date(),
+            // The bulk success shape carries no cancellationDate at all, unlike single cancel.
+            eimsCancellationDate: null,
+            eimsCancellationReasonCode: reasonCode,
+            eimsCancellationRemark: remark ?? null,
+          });
+        });
+        this.logger.log(`Invoice ${invoice.invoiceNumber} cancelled with EIMS via bulk (IRN ${invoice.eimsIrn})`);
+        await this.notifyBuyer(invoice);
+        results.set(invoice.id, {
+          invoiceId: invoice.id,
+          success: true,
+          message: `Invoice ${invoice.invoiceNumber} cancelled with EIMS.`,
+        });
+      }
+    }
+
+    return items.map((item) => results.get(item.invoiceId)!);
+  }
+
   async getEimsCancellationStatus(invoiceId: string): Promise<EimsInvoiceStatusView> {
     const invoice = await this.dataSource.manager.findOne(Invoice, { where: { id: invoiceId } });
     if (!invoice) throw new NotFoundException(`Invoice ${invoiceId} not found`);
diff --git a/apps/edr-freight-api/src/modules/eims/eims-invoice.controller.ts b/apps/edr-freight-api/src/modules/eims/eims-invoice.controller.ts
index 7d417551f..11eb214dc 100644
--- a/apps/edr-freight-api/src/modules/eims/eims-invoice.controller.ts
+++ b/apps/edr-freight-api/src/modules/eims/eims-invoice.controller.ts
@@ -5,6 +5,7 @@ import type { Response } from "express";
 import { BookingStaff } from "../../common/booking-guards";
 import { FREIGHT_PERMS } from "../../seed/freight-permissions.registry";
 import { sendPdf } from "../billing/billing.controller";
+import { BulkCancelEimsRegistrationDto } from "./dto/bulk-cancel-eims-registration.dto";
 import { CancelEimsRegistrationDto } from "./dto/cancel-eims-registration.dto";
 import { RegisterSalesReceiptDto } from "./dto/register-sales-receipt.dto";
 import { RegisterWithholdingReceiptDto } from "./dto/register-withholding-receipt.dto";
@@ -89,6 +90,17 @@ export class EimsInvoiceController {
     return this.cancellation.cancelInvoiceWithEims(id, dto.reasonCode, dto.remark);
   }
 
+  @Post("eims/bulk-cancel")
+  @BookingStaff(FREIGHT_PERMS.invoices.eimsCancel)
+  @ApiOperation({
+    summary:
+      "Cancel multiple invoices' registered EIMS documents in one call. Each invoice's outcome is " +
+      "reported independently — one failure never blocks the rest.",
+  })
+  bulkCancel(@Body() dto: BulkCancelEimsRegistrationDto) {
+    return this.cancellation.cancelBulkWithEims(dto.items);
+  }
+
   @Post(":id/eims/receipt/sales")
   @BookingStaff(FREIGHT_PERMS.invoices.eimsReceiptRegister)
   @ApiOperation({ summary: "Register a sales receipt with MoR EIMS against a registered invoice" })
diff --git a/apps/edr-freight-api/src/modules/eims/eims-registration.types.ts b/apps/edr-freight-api/src/modules/eims/eims-registration.types.ts
index 8094d0e74..60941825c 100644
--- a/apps/edr-freight-api/src/modules/eims/eims-registration.types.ts
+++ b/apps/edr-freight-api/src/modules/eims/eims-registration.types.ts
@@ -89,6 +89,46 @@ export interface EimsCancelResponse {
   body?: EimsCancelResponseBody;
 }
 
+/** `POST /v1/bulkCancel` — an array of the same `Irn`/`ReasonCode`/`Remark` shape as single cancel. */
+export type EimsBulkCancelRequest = EimsCancelRequest[];
+
+/**
+ * One element of a `/v1/bulkCancel` response array — MoR mixes success and error shapes in the same
+ * array, one entry per submitted IRN, disambiguated by `Status` (capital, error) vs `status`
+ * (lowercase, success — always `"C"`). Unlike single cancel, a bulk success carries no
+ * `cancellationDate` at all.
+ */
+export interface EimsBulkCancelSuccessItem {
+  id?: number;
+  tin?: string;
+  status: string;
+  mode?: string;
+  Irn: string;
+  ReasonCode?: string;
+  Remark?: string;
+}
+
+export interface EimsBulkCancelErrorItem {
+  Status: string;
+  msg: string;
+  Irn: string;
+}
+
+export type EimsBulkCancelResponseItem = EimsBulkCancelSuccessItem | EimsBulkCancelErrorItem;
+
+export interface EimsBulkCancelResponse {
+  statusCode?: number;
+  message?: string;
+  body?: EimsBulkCancelResponseItem[];
+}
+
+/** One invoice's outcome from `cancelBulkWithEims` — local eligibility failure or MoR's own result. */
+export interface EimsBulkCancelItemResult {
+  invoiceId: string;
+  success: boolean;
+  message: string;
+}
+
 /** Persisted failure detail. Carries the gateway's own error fields only — never our envelope. */
 export interface EimsInvoiceError {
   kind: string;