Legal analysis: lawyers can obtain the personal household registration information of the other party with the notice of acceptance of the case. Lawyers have the right to investigate and collect evidence by themselves, and only need "two certificates". When meeting a criminal suspect or defendant, you must have "three certificates" (lawyer's practice certificate, certificate of law firm, power of attorney or legal aid letter). However, although there are clear provisions in the law, it is generally difficult for lawyers to obtain evidence on their own, and defendants are often unwilling to cooperate. If criminal cases are involved, lawyers may have to bear their own personal risks.
Legal basis: Article 14 of People's Republic of China (PRC) Lawyers Law is a lawyer's practice institution. The establishment of a law firm shall meet the following conditions: (1) having its own name, domicile and articles of association; (2) Having lawyers who meet the requirements of this Law; (3) The promoter shall be a lawyer who has a certain practice experience and has not been punished for stopping practicing within three years; (4) Having assets that meet the requirements of the judicial administrative department of the State Council.