How to Get Your FIFA Backup Code?
1. Go to https://www.origin.com and sign in.
2. Sign in and choose "EA Account and Billing"
3. Click on the point"Security"
4. Click on "View" back up codes.
5. Copy the 3 black backup codes into the fields, gray codes are invalid.
Here is a guide video link: https://www.youtube.com/watch?v=qYXy2GTo6DE
More details, go to https://help.ea.com/en/article/origin-login-verification-information/