“The United States Chess Federation (USCF) rules require all players in rated sections to record their moves as they play. Chess tournaments ran by Caesar Chess enforce the USCF rules. If you are not familiar with how to record, read these articles (part 1 and part 2) and watch this video.”
The US Chess Federation (US Chess) is the official governing body and nonprofit 501(c)(3) organization for chess players and chess supporters in the United States.
Lichess is a free and open-source Internet chess server run by a non-profit organization of the same name. Users of the site can play online chess and play rated games.