A new law in California, if enforced, would make book signings at local bookstores extremely tedious on both readers and booksellers. A bookseller with three stores in the San Francisco area has filed a suit against the state this month to argue the law, which was promoted last year by actor Mark Hamill, will crush his stores. He’s capitalized on signed books and book signings over the last several years as a unique feature of his business. He hosts roughly 700 of these events each year.

In January, a state law went into effect that would require a record of many details related to a signature on any item sold for over $5. It’s not enough to stand before the author and watch him sign your book, nor can you go to the store the next day to buy a leftover signed copy. If the law were enforced (and so far I don’t know that it has been), a bookseller who sells an autographed book for a Lincoln plus will have to provide a certificate of authenticity with a description of the item signed, date, price, warranty, size of item, size for future editions, number of items signed, number of items intended to be signed in the future, state-issued serial number, and other details. Pawnbrokers are exempt as well as those who sign and sell their own stuff (because no fear of fraud there, obviously). These records will have to be kept for seven years.

One comic book dealer, who says they have authors sign every copy they have for later sale (and no markup for autographed copies), tells California Political Review, “To have to generate and track individual ‘Certificates of Authenticity’ for each and every book (let alone trying to identify potentially hundreds of existing items in our inventory) would make already break-even business even less tenable.”

The penalty for running afoul this law is 10x the value of the item sold plus legal fees.

The law doesn’t target booksellers. It apparently was intended to kill off expensive sales of fake signatures on sports and movie memorabilia. But the law says all autographed items sold for over $5, and once again lawmakers demonstrate that they slept through the course on unintended consequences.