What bank does medallion signature guarantee?

A medallion signature guarantee is not specific to a single bank; rather, it is offered by various financial institutions, including banks, credit unions, and brokerage firms. The guarantee serves to verify the authenticity of a person's signature on documents, particularly for the transfer of securities or other financial transactions. To obtain a medallion signature guarantee, you typically need to have an account with the institution providing the service. It's important to check with your local bank or credit union to see if they offer this service.