Bulgari's jewelry appraisal certificate can indeed be forged, which is a fact and cannot be avoided. But at the same time, through several judgment methods, the authenticity of the appraisal certificate can also be identified. 1, according to the name of the issuing agency, Baidu, find official website, enter the certificate code and make an inquiry. The content of the online certificate must be completely consistent with the entity certificate. 2. The certificate must be stamped by the appraisal institution and signed by two appraisers. 3. Weigh with an accurate jewelry scale, accurate to two decimal places, and compare whether the gram weight of the physical object is exactly the same as that marked on the certificate. If there is no problem after three times of textual research, it proves to be true. Otherwise, the certificate will be suspected of fraud.