The kid is moving from one club to ours because he likes the training and coaching better. Right now it's just hypothetical. The father believes the original club will put up a stink and threaten not to let him go and sign over his card. Hopefully none of this happens and all is smooth. Thanks
The club that currently holds his pass has the ability to make things difficult by dragging their feet and/or refusing to release the pass. There is technically nothing illegal about doing this, but it would at least be an ethical issue. Why would an adult at any club refuse to release an individual player who clearly wants to leave? From a business perspective, clubs do not want to get a reputation for disrupting individual player movement or being difficult to deal with.
In my experience, the only scenario where this becomes a factor is when multiple members of the same team request their release at the same time, or when a club fears that a single departure may have a snowball effect that impacts an entire team/age group. Even so, the worst they can do is refuse to release the pass (and/or any monies already paid), which only means the player would not be able to play in league games for the new club. If the training/coaching at the new club is a significant upgrade, I would still consider making the move and let the situation with the pass unfold between the 2 clubs. It's only U12 and training is much more important at that age.