What happens when I activate 2FA? July 07, 2022 08:00 Updated The One Time Passcode (OTP 6-digit number) will be sent to the email address you used to register for the McDonald's App. Related articles Can I reset/deactivate my account? What happens if I do not authenticate myself with 2FA? Why are you implementing 2FA now? Does this mean my McDonald’s® App was previously not secure? Can I redeem/use my deal after payment is made? I’m already a McDonald’s® App user. Why do I still have to authenticate myself with 2FA?