7.1 Fault on Service (WSF Rules of Squash, Rule 8)

A service is a fault (resulting in a hand-out — the opponent becomes the new server) when: The server fails to keep at least one foot inside the service box at the moment of striking the ball (foot fault) (Rule 8.1); The served ball strikes the front wall on or below the service line, or on or ab...

Source: Rule 8.1, Rule 8.2, Rule 8.3, Rule 8.4, Rule 8.5

Send this to your friend — argument over.