Stamp Collectors Against Dodgy Sellers
(SCADS)

Reference Info

Forgery Identification

Sheryll Oswald's Educational Articles for eBay Buyers and Sellers - forgeries, fakes, alterations and the problems of buying and selling in the Stamps category on eBay

Richard Doporto's Fakes Purchased on eBay - closeup photos and detailed exposés of deperfs, reperfs, faked grills, removed cancels, etc.

Comparative Philatelic Forgery Identification Site (international)

United States Stamps Commonly Trimmed to Look Imperforate

Commonly "Manufactured" Flat Plate Issues of the United States

Stamp Identification

How to identify U.S. #10s from #11s