Abstract: A gaming system (10) comprising communications means (12) operated by a player (22), a games facilitator (20), and an invoicing means (18), independent of the games facilitator (20), for invoicing the player (22) for participating in the game. When the games facilitator (20) receives a first communication message (44) sent via the communications means (12) over a communications network (16) from the player (22), containing a set of game entry information, the invoicing means (18) is notified of the first communication message (44) by the communications network (16) or the games facilitator (20) and generates a game participation invoice having a unique invoice identifier (46) and communicates the unique invoice identifier (46) to the games facilitator (20) and the player (22).