diff --git a/src/controllers/customer-branch-controller.ts b/src/controllers/customer-branch-controller.ts
index 329d512..c2220cc 100644
--- a/src/controllers/customer-branch-controller.ts
+++ b/src/controllers/customer-branch-controller.ts
@@ -34,7 +34,6 @@ type CustomerBranchCreate = {
 
   status?: Status;
 
-  branchNo: string;
   legalPersonNo: string;
 
   taxNo: string;
@@ -62,7 +61,6 @@ type CustomerBranchUpdate = {
 
   status?: "ACTIVE" | "INACTIVE";
 
-  branchNo?: string;
   legalPersonNo?: string;
 
   taxNo?: string;
@@ -228,6 +226,10 @@ export class CustomerBranchController extends Controller {
 
     const { provinceId, districtId, subDistrictId, customerId, ...rest } = body;
 
+    const count = await prisma.customerBranch.count({
+      where: { customerId },
+    });
+
     const record = await prisma.customerBranch.create({
       include: {
         province: true,
@@ -236,6 +238,7 @@ export class CustomerBranchController extends Controller {
       },
       data: {
         ...rest,
+        branchNo: `${count + 1}`,
         customer: { connect: { id: customerId } },
         province: { connect: provinceId ? { id: provinceId } : undefined },
         district: { connect: districtId ? { id: districtId } : undefined },