Usually, lawyers, as agents ad litem, need to sign when drafting criminal incidental civil litigation documents. The lawyer's signature can prove the authenticity and legality of the document, which also means that the lawyer is responsible for its content.
However, the specific situation may be different due to the legal provisions in different regions, and may also change due to the nature and requirements of specific cases. Therefore, it is recommended that you consult a local lawyer or legal professional institution to get more accurate legal advice.