Premier League clubs are being hit with a £5,000 fine every time a player swaps shirts after a game, with one side already penalised twice.
Fines have been issued after players were found by their Premier League-appointed Covid compliance officer to have shown 'ill-discipline regarding protocols'.
Clubs can choose to pay the fine or pass it on to players. The club which was fined twice ordered the two players who committed the breach to stump up. The opposing clubs are also thought to have been fined for their players' part in the shirt-swaps.
Sportsmail knows the name of the club, who do not want to be identified.