Forfeit - when your team does not have the minimum of 4 players to start a game, this is called a forfeit. This is registered as a loss for you and will cost your team a minimum fee of $140.
Walkover - when your opposition forfeits it your game, you are given a walkover, an automatic win for your team. The oppostion team is charged a fee and your team sheet fees will be carried over to your next game.
To avoid a forfeit, you can have fill in players to bring you up to 6 players. See the notes on Fill in players.