diff --git a/src/modules/auth/providers/auth.service.ts b/src/modules/auth/providers/auth.service.ts
index 56c7ca7..3cb1411 100755
--- a/src/modules/auth/providers/auth.service.ts
+++ b/src/modules/auth/providers/auth.service.ts
@@ -61,12 +61,16 @@ export class AuthService {
       await entityManager.begin();
       //
 
+      const isValid = await this.otpService.verifyOtp(phone, code, "REGISTER");
+      if (!isValid) throw new BadRequestException(AuthMessage.INVALID_OTP);
+
+      const existUser = await this.usersService.findOneWithPhone(phone, business.id);
+      if (existUser) throw new BadRequestException(AuthMessage.PHONE_EXISTS);
+
       const hashedPassword = await this.passwordService.hashPassword(completeRegistrationDto.password);
 
       const user = await this.usersService.createUser(completeRegistrationDto, hashedPassword, business, entityManager);
 
-      const isValid = await this.otpService.verifyOtp(phone, code, "REGISTER");
-      if (!isValid) throw new BadRequestException(AuthMessage.INVALID_OTP);
       await this.otpService.delOtpFormCache(phone, "REGISTER");
 
       const tokens = await this.tokensService.generateTokens(user, entityManager);