Where can/do we report "fake autograph" sellers?

[RichardSimon]

When ebay was in its infancy I was disgusted by what I saw on the autograph side.
Complaints to ebay executives went for naught.
I then visited the NYC Dept of Consumer Affairs to make a report about the situation.
They were interested in what I had to say and opened an investigation.
Under my direction, they made two undercover purchases, from two separate sellers that I had pointed out to them.
The two autographs (both fakes of Christy Mathewson) were then sent to the NYC Police Dept. Crime Lab. Forensic examinations (yes forensic ) were conducted on both items. I submitted authentic exemplars for them to work with.
Two weeks later the forensic report stated that both items were forgeries. The Dept of Consumer Affairs then asked me for a list of other crooked sellers. I submitted a list to them and ebay was contacted. A dozen crooked sellers were then removed by ebay.
If people are willing to do something, and you find the right people in law enforcement, then something can be done about crooked sellers.