1. The appraisal report shall be signed or sealed by the appraiser. It is legal as long as it is signed, and there is no need to stamp it. This is just a formal requirement. See article 77, paragraph 2.

Two, the appraisal report, but also need to be identified by the court, can be used as the factual basis of this case. See articles 76 to 79.

Attachment:

Article 76. The parties may apply to the people's court for identification of the professional issues. If the parties apply for appraisal, the qualified personnel shall be determined by both parties through consultation; If negotiation fails, it shall be designated by the people's court.

If the parties concerned do not apply for identification, and the people's court considers it necessary to identify specialized issues, it shall entrust qualified personnel for identification.

Article 77. The appraiser has the right to know the case materials needed for the appraisal, and may ask the parties and witnesses when necessary.

The appraiser shall put forward written appraisal opinions and sign or seal the appraisal book.

Article 78 If the parties have objections to the expert opinion or the people's court thinks that the expert should appear in court, the expert should testify in court. If the appraiser refuses to testify in court after being notified by the people's court, the appraisal opinion shall not be used as the basis for ascertaining the facts; The party who paid the appraisal fee may request the return of the appraisal fee.

Article 79. The parties may apply to the people's court to notify persons with specialized knowledge to appear in court and give their opinions on the appraisal opinions or conclusions made by the appraisers.