Did you write the letter of understanding yourself or the police station?

Legal analysis: write it yourself. The letter of understanding is issued by the injured party. If the court is ready, the parties can sign for confirmation, which is effective. It is not stipulated that the victim must write it in person, but it must be signed by himself or his close relatives. The focus of the letter of understanding should be to make it clear that the victim has understood, and at the same time, the victim requests to be exempted from the criminal responsibility of the defendant, that is, the criminal suspect.

Legal basis: Criminal Procedure Law of People's Republic of China (PRC).

Article 288 In the following cases of public prosecution, the criminal suspect or defendant sincerely repents and obtains the victim's understanding through compensation for losses or apology. (1) If a civil dispute is caused, it is suspected of a criminal case stipulated in Chapters IV and V of the Specific Provisions of the Criminal Law and can be sentenced to fixed-term imprisonment of not more than three years; (two) criminal cases of negligence other than dereliction of duty that may be sentenced to fixed-term imprisonment of not more than seven years. If a criminal suspect or defendant intentionally commits a crime within five years, the procedures specified in this chapter shall not apply.

Article 289 If both parties reach a settlement, the public security organ, the people's procuratorate and the people's court shall listen to the opinions of the parties and other relevant personnel, examine the voluntariness and legality of the settlement, and preside over the making of a settlement agreement.