Legal analysis: not necessarily. If it is not signed, it can be served by lien, and the legal effect of the judgment will not be affected when it expires, and the court can close the case. If the addressee or his adult family members who live together refuse to receive the litigation documents, the addressee may invite the representatives of relevant grass-roots organizations or units to be present to explain the situation, and record the reasons and date of refusal on the service receipt, which shall be signed or sealed by the addressee and witnesses.

Legal basis: Article 285 of the Procedures for Handling Criminal Cases by Public Security Organs. Investigators investigating a case that has been closed shall make a closing report. The closing report shall include the following contents: (1) Basic information of the criminal suspect; (two) whether compulsory measures have been taken and the reasons; (3) The facts and evidence of the case; (4) Legal basis and handling opinions.