[markf31]

Back to the direct question posed in the OP. You can report the dealing and selling of suspected fake and forged autographs to a number of entities.

First I would confront the business who is selling the suspected fakes and forgeries. Ask if they’re aware the autographs are forgeries or possible forgeries. If they disagree with your opinion, ask if they’re willing to stand behind their own claim to the legitimacy of the autographs in question. Now if you yourself are 100% certain they are selling forgeries, and if it’s a local business owner, you can always leverage pressure on the owner yourself. These steps can only be taken if you’re 100% certain, as the business can always come back at you with a libel/slander suite. You can write open letters in your local newspaper about the business or auction house as well.

Steps to report the company/business can include:
You can always start with your local police department
Write a letter to your local District Attorney and ADA
Write a letter/contact your local and state elected officials
Contact local attorneys who specialize in consumer rights
Contact your local NACA office (National Association of Consumer Advocates)
Contact the Better Business Bureau (BBB)
Contact other local consumer protection agencies
Sometimes the business may be part of small business associations, contact these associations as well with your concerns

Most of the above referenced contacts can be utilized if the potention seller if not local to you as well.

Some due diligence, even extreme due diligence, is needed on your part to provide and site clear examples and very concise and specific information when reporting the business in question. In my experience, the more concise your report is, the more detailed and specific your background information is then the more serious that the above mentioned entities will take and investigate your complaint. And don’t shy away from persistence, not by reporting the same set of facts and instances over and over, but showing and proving that the business in question continually over a period of time engages in the selling of forged autographs. And if you can find fellow collectors in your local area who can also vouch for your reports, and are also willing to join the fight with you, and add their names to the complaints, well that only lends more credability to your complaint.

The process isn't always easy, it can be very time consuming, and it can take years before any results are realized. I believe this puts a lot of people off from reporting even the possability of someone selling forgeries. It takes a lot more than simply going to the police station, filling a report, pointing a finger and screaming that someone is possibly selling forged autographs.