diff --git a/src/app/(app)/invoicing/page.test.tsx b/src/app/(app)/invoicing/page.test.tsx
index 3f08f98..0602a50 100644
--- a/src/app/(app)/invoicing/page.test.tsx
+++ b/src/app/(app)/invoicing/page.test.tsx
@@ -211,6 +211,9 @@ describe("InvoicingPage", () => {
     stockBookingsListMock.mockReset();
     stockBookingsListMock.mockResolvedValue(buildPageResult([], 1, 100));
     process.env.NEXT_PUBLIC_QB_INVOICE_WEBHOOK_URL = "https://n8n.test/webhook/invoice";
+    // Auto-accept the order-number sanity confirm dialog by default.
+    // Individual tests can override this with their own spy.
+    vi.spyOn(window, "confirm").mockReturnValue(true);
   });
 
   afterEach(() => {
diff --git a/src/app/(app)/invoicing/page.tsx b/src/app/(app)/invoicing/page.tsx
index 588039a..555762f 100644
--- a/src/app/(app)/invoicing/page.tsx
+++ b/src/app/(app)/invoicing/page.tsx
@@ -1995,7 +1995,6 @@ export default function InvoicingPage() {
         // the order number for convenience, so this trim keeps the
         // default-no-fuss UX while letting an explicit number pass
         // through when the operator actually wants one.
-        const trimmedOverride = payload.orderNumberOverride?.trim() ?? "";
         const explicitDeliveryNoteNumber =
           trimmedOverride && trimmedOverride !== group.orderNumber
             ? trimmedOverride