Wasps have been punished after playing too many loan players in last month's Anglo-Welsh Cup game against London Irish.
Wasps played six loan players, rather than the permitted three, in the round-three match on January 27, which they lost 66-7.
Aidan O'Brien, the single judicial officer who heard the case on papers, said: "The appeal chairman found that the breach was a consequence of an administrative oversight on the part of the club and that there was no intention by the club to gain an unfair advantage over the opposition in selecting a prohibited number of loan players.
"The electronic match card system did not flag up the club's error during the registration process, which was regrettable.
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"However the club ultimately remains responsible for compliance with the regulations, which it at all times accepted.
"As Wasps have no further fixtures in this competition, the chairman determined that a financial penalty was the appropriate sanction in this case.
"The club was fined £500 for the first additional loan player and £1,000 for each additional loan player thereafter (a total fine of £2,500)."
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