The mediation agreement of public security cases does not require the signature of witnesses. Without witnesses, the mediation agreement signed by both parties under the auspices of the public security organ still has legal effect.

Witness signature is to protect the legitimate rights and interests of both parties. Since there is no dispute between the two sides, there is no need for the signature of the witness.

Of course, it is best to have the signature of a witness. Once there is a dispute in the future, witnesses can be used as witnesses to tell the truth of mediation.