Facebook provides a set of one-time-use recovery codes that you can download as a .txt file or print. This is part of the Two-Factor Authentication security feature.
: Your recovery codes are as sensitive as your password. Store them in a secure, offline location or an encrypted password manager. Set up Facebook login recovery codes | Facebook Help Center Download 72x Facebook com Code Accounts txt
: You can click Show Codes to see them or Get New Codes . From here, you can copy the list into a .txt file on your device for safekeeping. Security Warning Facebook provides a set of one-time-use recovery codes