What is the ruling on paying money to witnesses who stipulate it in order to secure a fixed right to land, and what is the ruling on them taking money in exchange for this testimony?

It is not permissible to take a fee for bearing witness, and doing so is considered a bribe that compromises the witness's integrity and invalidates their testimony. One should seek witnesses who do not demand payment. If no others can be found, they must be reminded of the impermissibility of taking a fee and the obligation to bear witness. If this is ineffective and there is no other way to secure the right except by paying money, then there is no blame upon the claimant, and the sin falls upon the witnesses. It is not necessary to inform the judge of this so that the testimony is not rejected and the right is not lost.