Generally, the authenticity of a guitar dealer’s certificate can be identified through the anti-counterfeiting code on the dealer’s certificate.

The certificates issued by guitar dealers for guitars are generally professional and have anti-counterfeiting marks.

If consumers feel there is a problem after purchasing a guitar, they can determine the authenticity of the guitar by identifying the authenticity of the guitar dealer's certificate.

Usually dealers’ anti-counterfeiting certificates will have barcodes to identify them, or irregular strings of characters.

So you can use these things to identify the authenticity of other dealers' certificates.