What is a medallion signature guarantee STAMP?
A medallion signature guarantee is also known as a Securities Transfer Agents Medallion Program (STAMP) imprint. STAMP is the official signature guarantee program recognized and approved by the financial industry, and supported and endorsed by the Securities Transfer Association (STA). Transfer agents and others who rely on a signature guarantee from a member of STAMP are protected against loss from wrongful endorsements. The medallion signature guarantee is not to be confused with a notary public.