What happens when I activate 2FA? February 10, 2026 03:06 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 I did not receive the two-factor authentication (OTP) email. What should I do? How can I authenticate my app with 2FA OTP if I happen to forget my email/password? When does the McDonald’s® App require me to 2FA? When will I be charged for the order? Do I get a receipt after confirming the payment? What happens if I forget my password?