THE AFL has fined GWS $10,000 for an embarrassing anti-doping mistake.

The Giants were left red-faced after they failed to keep ASADA briefed properly on players' addresses.

Under the anti-doping code, players can be tested throughout the year and the whereabouts provision is a critical feature of the testing regime.

News of the blunder comes only five days before the AFL Anti-Doping Tribunal hands down its verdict on 34 current and past Essendon players.

"All clubs have a requirement to be fully compliant with all the paperwork requirements of the Anti-Doping Code to ensure that ASADA is fully informed at all times and can perform its duties," AFL general counsel Andrew Dillon said in a statement.

"In this instance, it is important that the rules are fully complied with and a financial sanction is appropriate."

Giants general manager of football operations Graeme Allan said the club was at fault and accepted the sanction.

"We have a strong commitment to upholding and adhering to the game's integrity framework but we acknowledge that a basic administrative error has resulted in player addresses not being communicated properly," Allan said.