diff --git a/src/controllers/branch-controller.ts b/src/controllers/branch-controller.ts
index 5e65729..c5384e3 100644
--- a/src/controllers/branch-controller.ts
+++ b/src/controllers/branch-controller.ts
@@ -297,6 +297,14 @@ export class BranchController extends Controller {
     const { provinceId, districtId, subDistrictId, headOfficeId, bank, contact, code, ...rest } =
       body;
 
+    if (head && head.code.slice(0, -6) !== code) {
+      throw new HttpError(
+        HttpStatus.BAD_REQUEST,
+        "Headoffice code not match with branch code",
+        "codeMismatch",
+      );
+    }
+
     const record = await prisma.$transaction(
       async (tx) => {
         const last = await tx.runningNo.upsert({
@@ -310,6 +318,18 @@ export class BranchController extends Controller {
           update: { value: { increment: 1 } },
         });
 
+        if (last.value === 1) {
+          const exist = await tx.branch.findFirst({
+            where: { code: `${code?.toLocaleUpperCase()}${`${last.value - 1}`.padStart(6, "0")}` },
+          });
+          if (exist)
+            throw new HttpError(
+              HttpStatus.BAD_REQUEST,
+              "Branch with same code already exists.",
+              "sameBranchCodeExists",
+            );
+        }
+
         return await tx.branch.create({
           include: {
             province: true,