Authorized by the client, a lawyer can hold relevant certificates to inquire about personal household registration information at the location of the client's household registration.
When inquiring about citizens' household registration information, practicing lawyers need to bring the original and photocopy of lawyer's practice certificate and letter of introduction from law firm. The letter of introduction of a law firm shall specify the lawyer's name, legal affairs undertaken, the name of the inquired person or the citizen's identity number, etc. And the relevant materials after verification shall be kept by the public security organ.