Legal analysis: The written decision on administrative penalty is not signed by the parties concerned, so it cannot be enforced in general. In case of imprecise consideration or incorrect understanding of legal provisions in the process of handling cases, the following procedures should be followed: 1, check the corresponding provisions of administrative punishment with relevant personnel again, and check with punishment laws and standards to see if there are any defects; 2. Check whether the punishment result is moderate and exceeds the punishment limit; 3. Further study the reason why the punished person doesn't sign, which is the objective or subjective reason of the punished person; 4. After the above steps are verified, even if the punished party does not sign, it can be enforced.

Legal basis: Article 101 of the Law of People's Republic of China (PRC) on Public Security Administration Punishment makes a decision on public security administration punishment on the spot, and the people's police shall show their work certificates to the violators of public security administration and fill in the punishment decision. The penalty decision shall be delivered to the punished person on the spot; If there is an infringer, a decision will be copied to the infringer. The written decision on punishment stipulated in the preceding paragraph shall specify the name of the person being punished, the illegal act, the basis for punishment, the amount of the fine, the time and place, and the name of the public security organ, and shall be signed or sealed by the responsible people's police. If a decision on administrative punishment for public security is made on the spot, the people's police shall report it to the public security organ for the record within twenty-four hours.