diff --git a/src/controllers/branch-controller.ts b/src/controllers/branch-controller.ts
index aa808dc..e8fb801 100644
--- a/src/controllers/branch-controller.ts
+++ b/src/controllers/branch-controller.ts
@@ -330,6 +330,14 @@ export class BranchController extends Controller {
             );
         }
 
+        if (last.value !== 1 && !headOfficeId) {
+          throw new HttpError(
+            HttpStatus.BAD_REQUEST,
+            "Branch with same code already exists.",
+            "sameBranchCodeExists",
+          );
+        }
+
         return await tx.branch.create({
           include: {
             province: true,