Legal analysis: According to the provisions of our country’s criminal procedure law, if the person involved cannot write, the confession of a witness or criminal suspect can be signed by fingerprint, which is also legally binding.

Legal basis: Article 122 of the "Criminal Procedure Law of the People's Republic of China" The interrogation transcript shall be handed over to the criminal suspect for checking, and for those who cannot read, it shall be read to him. If there are omissions or errors in the record, the criminal suspect may submit supplements or corrections. After the criminal suspect admits that there are no errors in the transcript, he shall sign or seal it. The investigators should also sign the transcript. If a criminal suspect requests to write a confession on his own, he shall be allowed to do so. When necessary, investigators may also ask the criminal suspect to write a confession in his own hand.