What is the ruling on signing a contract that includes a condition which violates Islamic Sharia, given the signatory's dislike for this condition and their compulsion to agree to it, and what is the ruling concerning the witnesses who were unaware of this condition? What ought to be done in such cases in the future?

There is no objection to signing a contract that includes considering the conditions of a state that governs by Islamic law, provided one dislikes any condition or ruling that contradicts the law of Allah, and accepts only what conforms to Islamic law. This is because when a matter becomes difficult, it expands, and there is no hardship in religion. Contracts that involve signing to accept laws in general are among the matters that have become widespread difficulties.