Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. A signature guarantee is a form of authentication, issued by a bank or other financial ...

I am a registered representative and work out of a credit union. The credit union has a Medallion Stamp Signature Guarantee. We try to follow the guidelines offered by Kemark Financial Services (which ...

A signature guarantee is not the same thing as notarization. A notary public cannot guarantee a signature. A signature guarantee, sometimes called a Medallion Guarantee, or a Green Medallion, is an ...