---
title: "Multi-Factor Authentication MFA | No MFA Phone Number added"
description: "**What happens if the user does not provide a phone number for MFA?** - If MFA Mobile # is left blank the multi factor authentication will choose to email verification code only. - This is the same for both Web…"
url: "https://spydertech.net.au/docs/multi-factor-authentication-mfa-no-mfa-phone/"
updated: "2025-04-24"
category: "Multi-Factor Authentication MFA"
---

# Multi-Factor Authentication MFA | No MFA Phone Number added

**What happens if the user does not provide a phone number for MFA?**

- If MFA Mobile # is left blank the multi factor authentication will choose to email verification code only.
- This is the same for both Web and Mobile App SpyderFlow.

The user will follow the default process of MFA and receive verification code to their email.