diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 2e1eaa6..a6994e7 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -29,6 +29,7 @@ model User {
   isEmailVerfied   Boolean?  @default(false) @map("is_email_verified")
   isMobileVerfied  Boolean?  @default(false) @map("is_mobile_verified")
   isProfileUpdated Boolean?  @default(false) @map("is_profile_updated")
+  userRefNumber    String?   @map("user_ref_number") @db.VarChar(20)
   isActive         Boolean?  @default(true) @map("is_active")
   createdAt        DateTime? @default(now()) @map("created_at")
   updatedAt        DateTime? @updatedAt @map("updated_at")
diff --git a/src/modules/host/handlers/Host_Admin/onboarding/signUp.ts b/src/modules/host/handlers/Host_Admin/onboarding/signUp.ts
index 178a893..de4d8a6 100644
--- a/src/modules/host/handlers/Host_Admin/onboarding/signUp.ts
+++ b/src/modules/host/handlers/Host_Admin/onboarding/signUp.ts
@@ -12,6 +12,21 @@ import { ROLE } from '../../../../../common/utils/constants/common.constant';
 const prismaService = new PrismaService();
 const hostService = new HostService(prismaService);
 
+export async function generateHostRefNumber(tx: any) {
+  const lastrecord = await tx.user.findFirst({
+    orderBy: {
+      id: 'desc',
+    },
+    select: {
+      id: true,
+    },
+  });
+
+  const nextId = lastrecord ? lastrecord.id + 1 : 1;
+
+  return `HS-${String(nextId).padStart(6, '0')}`;;
+}
+
 export const handler = safeHandler(async (
   event: APIGatewayProxyEvent,
   context?: Context
@@ -44,13 +59,15 @@ export const handler = safeHandler(async (
 
     let newUserLocal;
 
+    const referenceNumber = await generateHostRefNumber(tx);
+
     if (user && !user.userPassword) {
       // reuse existing invited user record
       newUserLocal = user;
     } else {
       // create new user record within the transaction
       newUserLocal = await tx.user.create({
-        data: { emailAddress: email, roleXid: ROLE.HOST },
+        data: { emailAddress: email, roleXid: ROLE.HOST, userRefNumber: referenceNumber },
       });
     }
 
diff --git a/src/modules/minglaradmin/services/minglar.service.ts b/src/modules/minglaradmin/services/minglar.service.ts
index db60eaf..d325923 100644
--- a/src/modules/minglaradmin/services/minglar.service.ts
+++ b/src/modules/minglaradmin/services/minglar.service.ts
@@ -86,6 +86,28 @@ export class MinglarService {
     return true;
   }
 
+  async generateHostRefNumber(tx: any, role_xid: number) {
+    const lastrecord = await tx.user.findFirst({
+      orderBy: {
+        id: 'desc',
+      },
+      select: {
+        id: true,
+      },
+    });
+    let referenceId = '';
+
+    const nextId = lastrecord ? lastrecord.id + 1 : 1;
+
+    if (role_xid === ROLE.ACCOUNT_MANAGER) {
+      referenceId = `AM-${String(nextId).padStart(6, '0')}`;
+    } else if (role_xid === ROLE.CO_ADMIN) {
+      referenceId = `CA-${String(nextId).padStart(6, '0')}`;
+    }
+
+    return referenceId;
+  }
+
   async createHost(data: CreateMinglarDto) {
     return this.prisma.user.create({ data });
   }
@@ -337,12 +359,15 @@ export class MinglarService {
         throw new ApiError(400, 'User already exists.');
       }
 
+      const referenceNumber = await this.generateHostRefNumber(tx, roleXid);
+
       // Create user with INVITED status
       const user = await tx.user.create({
         data: {
           emailAddress: emailAddress,
           roleXid: roleXid,
           userStatus: USER_STATUS.INVITED,
+          userRefNumber: referenceNumber
         },
       });