Legal analysis: it must be signed, so that the judgment will have legal effect. If one party does not sign, it needs to be served by other means, such as announcement.

Legal basis: Article 86 of the Civil Procedure Law of the People's Republic of China, if the addressee or his adult family members who live together refuse to accept the litigation documents, the addressee may invite the representatives of the relevant grass-roots organizations or units to be present, explain the situation, record the reasons and date of refusal on the service receipt, and sign or seal it by the addressee and witnesses. The litigation documents may be left at the addressee's residence, and photos may be taken.