Here is an idea, how about if when you sale a player that was raised in the Youth system of you team, there could be a clause that you can recieve $ if he becomes a Star and he is latter sold lets say you get anywhere from 1-10% of the sold price this can be specified when the player is sold.

it’s a nice idea, but fired = fired and sold = sold…is see not really a reason to pay the original club after you let go of a player.

Nice idea once we have a big club clause.
Like Vaughn said there is no reason for reseving money after you sold/fired a player.
But when a player want to leave your team because he wants to play in a bigger team/competition it would be nice to have such a clause.
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Perhaps you can choose this clause when you negotiate for a contract.

What we have planned are transfer clauses which could include something like “X% of next transfer”. For example, you could sell a player for 1M with this clause saying 10% of next transfer. If the other team sells him in the future for 10M you’ll receive 1M more.