If the confession signed by the criminal was identified at that time and there was no doubt, then the confession could not be changed after being signed and fingerprinted. After confirming that there are no mistakes in the transcript, it shall be signed or sealed. Investigators should also sign the records.

According to Article 120 of the Criminal Procedure Law of People's Republic of China (PRC), the interrogation record shall be checked by the criminal suspect and read to him if he can't read. If there are omissions or errors in the record, the criminal suspect may make additions or corrections.

The criminal suspect shall sign or seal his name after admitting that it is correct in the record. Investigators should also sign the records. If a criminal suspect requests to write his own confession, it shall be allowed. When necessary, investigators may also ask the criminal suspect to write a confession in person.