Apply to the court for transfer after filing the case. After filing the case, if you inquire in person, you need the court to issue a letter of investigation and evidence collection. If it is necessary for filing a case, it needs to be searched before filing a case. It is recommended to entrust a lawyer to retrieve it. According to the provisions of the court on bringing a lawsuit, the plaintiff should provide the identity information of the defendant (including a copy of the ID card or household registration information issued by the public security organ, etc.). ) when filing a civil lawsuit. Under normal circumstances, public security organs will not provide individuals with other people's household registration information. After hiring a lawyer, the lawyer can obtain the relevant identity information of the other party with the lawyer's certificate, power of attorney and letter of introduction from the law firm.