TIL if an NFL team forfeits, the other team automatically wins 2-0. Those two points are not added to the team's season points that are used for tiebreaker scenarios.

https://operations.nfl.com/media/3277/2018-nfl-rulebook_final-version.pdf

https://www.reddit.com/r/todayilearned/comments/16apbyn/til_if_an_nfl_team_forfeits_the_other_team/