Google and Discord are 2 platforms that use MFA, and they provide backup codes for you to use. It's not a 1 time thing, you can get more if needed...incase they're exhausted or compromised.
Any request for new codes will invalidate the old ones, rendering them completely useless in-case they got compromised somehow.
The only shown once refers to that the option to view or download is given once. Once closed out, you cant pull it up again, and would need to generate a replacement to access the new list to save.
Can I turn in a paper without citing all sources?
"No."[1]
1. William Shakespeare,
Hamlet
, Act III, Scene 1, line 96.
18-Mar-2023 04:06:18