Official Rules of Racquetball

4.2 - Serve in Doubles

(a) Order of Serve. Before the match begins, each team shall inform the referee of their team’s order of service, which shall be followed throughout the match. The order of serve may be changed between games, provided that the referee has been verbally notified before the first serve of the new game. At the beginning of each game, when the first server of the first team to serve is out, the team is out. Thereafter, both players on each team shall serve until the team receives a handout and a sideout.

(b) Partner's Position. On each serve, the server's partner shall stand erect with back to the side wall and with both feet on the floor within the service box from the moment the server begins the service motion until the served ball passes the short line. Violations are called foot faults. However, if the server's partner enters the safety zone before the ball passes the short line, the server loses service.

(c) Changes of Serve. In doubles, the side is retired when both partners have lost service, except that the team that serves first at the beginning of each game loses the serve when the first server is retired.