Want it. I want to sign traffic accident responsibility confirmation. But even if you don't sign, it won't affect the validity of the confirmation letter. The traffic accident certificate shall be signed or sealed by the police handling the case, and stamped with the special seal for road traffic accident handling of the traffic management department of the public security organ, so that it has legal effect. Legal basis: Article 73 of the Road Traffic Safety Law of the People's Republic of China, the traffic administrative department of the public security organ shall, according to the on-site inspection, inspection, investigation and relevant inspection and appraisal conclusions of the traffic accident, make a traffic accident identification in time as evidence for handling the traffic accident. The traffic accident certificate shall state the basic facts, reasons and the responsibilities of the parties, and shall be served on the parties.