Legal analysis: the ticket issued by the traffic police is invalid without the signature and seal of the traffic police. If it is entered into the system, you can file an administrative reconsideration and decide whether to pay the fine according to the result of the administrative reconsideration. But usually, if there is enough evidence to prove that the ticket is issued illegally, it will still be punished.

Legal basis: Administrative Punishment Law of the People's Republic of China.

Thirty-fourth administrative organs may formulate standards for the discretion of administrative punishment according to law, and regulate the exercise of the discretion of administrative punishment. The benchmark of administrative penalty discretion shall be announced to the public.

Article 35 When the illegal act constitutes a crime and the people's court sentences the party to criminal detention or fixed-term imprisonment, if the administrative organ has already given the party administrative detention, the corresponding sentence shall be reduced according to law. When the illegal act constitutes a crime and the people's court imposes a fine, if the administrative organ has imposed a fine on the party concerned, the corresponding fine shall be reduced; If the administrative organ fails to impose a fine on the party concerned, it shall not impose a fine.