The AFL have fined Carlton $10,000 after the Blues failed to follow anti-doping whereabouts rules for multiple players on an end-of-season trip.
Carlton received the biggest fine among four clubs, with Melbourne, the Western Bulldogs and Richmond also failing to provide complete information.
The AFL fined the Demons $5000, while the Bulldogs and Tigers were fined $2500 apiece.
It's understood Melbourne's breach involved two players and there were individual whereabout problems at the other two clubs.
The whereabouts system is a key part of ASADA's anti-doping regime and in the AFL, it's the responsibility of the clubs to keep the information up to date.
It means ASADA can conduct out-of-competition tests without warning.
If an athlete is unavailable for testing, in some cases it can count as an anti-doping violation and lead to a ban.
The fines were all for breaches of whereabouts information at the AFL's end of the anti-doping administration.
"All clubs need to constantly ensure that whereabouts requirements are met at all times," said AFL general counsel Andrew Dillon.