What is the ruling on taking money from the headman for signing a birth certificate?

The questioner : O Musa, it is permissible regarding the underlying cause. That he takes one thousand riyals on the condition that he signs the birth certificate.

The Shaykh : If this headman wants to sign the birth certificate and take one thousand riyals, if he is truthful in his testimony, then the one thousand riyals are forbidden for him, because Allah the Exalted says: Testimony must be for the sake of Allah, and it is not permissible for anyone to make a contract based on it except through injustice.
And if he is lying in his testimony and testifying to what he does not know, then he is a liar and one who consumes wealth unjustly. So it is not permissible for a headman to take a fee for his testimony, whether he is truthful or lying, because if he is truthful, he has consumed wealth unjustly, which is not permissible for him, and if he is lying, he has lied and consumed wealth unjustly, combining the two evils, may Allah protect us from that. Yes.