If a lawyer is entrusted to act as a defender or agent, a written contract for entrusted defense of criminal cases shall be signed with a law firm, and the lawyer of the law firm shall act as a defender. The contract will specify the rights and obligations of both parties, the collection of fees, and the liability for breach of contract. , including appointing another lawyer when the appointed lawyer is incompetent, and how to refund the fee after breach of contract. Both parties shall strictly perform their contractual obligations and enjoy corresponding rights. The law gives the defendant the right to change his lawyer as a defender.
According to the provisions of China's Lawyers Law, when a lawyer acts as a defender, he should, according to facts and laws, put forward materials and opinions on whether the criminal suspect or defendant is innocent, the crime is light or the criminal responsibility is reduced or exempted, so as to safeguard the litigation rights and other legitimate rights and interests of the criminal suspect or defendant. The client may refuse the lawyer entrusted by him to continue to defend him, and at the same time, he may entrust another lawyer as a defender. After accepting the entrustment, a lawyer shall not refuse to defend without justifiable reasons. However, if the entrusted matter is illegal, the client uses the services provided by the lawyer to engage in illegal activities, or the client deliberately conceals important facts related to the case, the lawyer has the right to refuse to defend. Article 43 of the Criminal Procedure Law stipulates: "During the trial, the defendant may refuse the defender to continue to defend him, or entrust another defender to defend him."
Article 60 of the Civil Procedure Law stipulates that if the authority of an agent ad litem is changed or revoked, the parties shall notify the people's court in writing, and the people's court shall notify the other party.