RandomSoccerFan
GOLD
The forcing part comes not directly from the clubs, but from the leagues that are sanctioning the competitions that the clubs put teams in. Player needs a valid player card for the season. Rules for obtaining that player card are X. Under no circumstances are any of the legitimate leagues going to go down the path where they no longer require current and valid player cards, as it starts to touch on all sorts of thorny issues including insurance and liability.