So:
No, players do not automatically lose 10% of their transfer fee if they submit a transfer request. While a transfer request can lead to the loss of certain contractual bonuses like loyalty bonuses or signing-on fees, it doesn't directly reduce the transfer fee itself. The player's agent may also have clauses in their contract that could affect the transfer fee, but this is separate from the club's actions regarding the player's request.
Transfer Requests and Contractual Bonuses:
Transfer requests can void clauses in a player's contract related to loyalty bonuses or signing-on fees, which are often paid out over the course of the contract.
Negotiated Fees:
Players can negotiate additional compensation, such as a sell-on fee percentage, where they or their agent receive a portion of the transfer fee if they are sold.
No Direct Loss of Transfer Fee:
A transfer request does not mean the player automatically loses a percentage of the transfer fee. The fee is negotiated between the selling and buying clubs.
Potential for Negotiation:
Clubs and players can negotiate terms of a transfer, including the transfer fee, as long as it's within legal frameworks.