Shakhtar CEO Serhiy Palkin wants to have a clause in the contract when signing new players that would prohibit players from leaving the club suddenly. This is reported by The New York Times.
Sergei Palkin
According to the source, there may be clauses in the agreements that would prevent new players from taking advantage of any FIFA rules, including on contract termination. Any player signing an agreement now surely understands the obligations he is undertaking.
As a reminder, Palkin previously stated that the club had no money.