1. Plenipotentiary is a special form of entrustment, which refers to entrusting all the authority of civil legal acts to the trustee. The trustee has a wide scope of authority, but it needs to sign a power of attorney.
2. Legal basis: Article 89 of the Supreme People's Court's Interpretation of Application.
The power of attorney submitted by the parties to the people's court shall be sent to the people's court before the court session. If the power of attorney only says "full authorization" without specific authorization, the agent ad litem has no right to admit, abandon or change the claim, make a settlement, file a counterclaim or appeal on his behalf.
Second, after a criminal private prosecution case is authorized by a lawyer, do the parties have to appear in court?
1. If the people's court decides to allow the private prosecutor to withdraw the lawsuit or the parties reach a settlement on their own, and take compulsory measures against the defendant, it shall immediately reject it;
2. If the private prosecutor refuses to appear in court without justifiable reasons after being summoned twice according to law, or withdraws from court without the permission of the court, the people's court shall decide to dismiss the prosecution according to the situation of the private prosecutor;
3. There are more than two private prosecutors, and the partial withdrawal of the case does not affect the continued trial of the case;
4. During the trial of a private prosecution case, if the defendant's whereabouts are unknown, the trial shall be suspended. After the defendant is brought to justice, the trial shall be resumed and compulsory measures shall be taken against the defendant if necessary.