If you sell – or buy – baseball cards, autographed documents, books, pictures or just a single celebrity autograph, avoid California. A new law meant to protect collectors of sports memorabilia goes too far. If you sell anything worth more than $5 that has an autograph, it must have a certificate of authenticity. The certificate costs money. And the certificate must include if the seller is insured, the date, place and name of a witness to the appraisal, and who might have sold it before. Anyone selling books, sports or movie memorabilia, art, or “stuff” at consignment shops or house sales must get certificates and the records must be stored for seven years. There is a large fine for selling a fake or anything without the certificate. We autograph hundreds of our books each year. Would we need a certificate for each book? The law covers sales in California or items sold to a California customer and goes into effect in January 2017. Some California shows say they are already losing dealers.

A typical collectible that will be affected by the California law is this autographed photo of John Philip Sousa, composer and conductor known for his patriotic marches. It’s also signed with four bars of music, and sold for $750, long before the California law goes into effect. Photo courtesy of Swann Auction Galleries.