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 38 of the Criminal Procedure Law of People's Republic of China (PRC), defense lawyers can provide legal assistance to criminal suspects during investigation; Acting as an agent for complaints and accusations; Apply for changing compulsory measures; Ask the investigation organ about the crimes and cases suspected by the criminal suspect, and put forward opinions.