1, you can entrust a lawyer to inquire. The specific practice of lawyers is generally to go to the court to apply for an investigation order, and take the investigation order to the local police station and household registration center to obtain the identity information of the defendant.
2. After filing the case, the plaintiff may apply to the court for an investigation letter and inquire at the police station. After the case is filed, the court will return it on the grounds that the defendant's identity information is insufficient. At this time, you can ask the court to write a letter of assistance to you. Take the letter of assist to the household registration center to retrieve the identity information of the defendant.
3. Ask the court to help you retrieve the defendant's information. As early as 20 19, the Supreme People's Court clearly stipulated that as the plaintiff, you only need to provide information that can distinguish the identity of the defendant, and the ID number is the information that distinguishes the defendant from others.