Draw by resignation?

Draw by resignation: Under FIDE Laws, a game is drawn if a player resigns and no sequence of legal moves would allow the opponent to checkmate that player.

https://en.wikipedia.org/wiki/Chess

5.1.2    The game is lost by the player who declares he/she resigns (this immediately ends the game), unless the position is such that the opponent cannot checkmate the player's king by any possible series of legal moves. In this case the result of the game is a draw.

https://handbook.fide.com/chapter/E012023

Apparently, this is a new rule.  Common practice would be that the player who resigns loses the game regardless.

This doesn't seem to be part of the U.S. Chess Federation rules, meaning that this rule would only apply to international tournaments.

http://www.uschess.org/docs/gov/chessrules/US_Chess_Rule_Book-%20Online_Only_Edition_v7.1-1.2.11-7.19.19.pdf