What banks offer medallion?

Medallion signature guarantees are typically offered by some major banks, credit unions, and brokerage firms. Notable banks that often provide this service include JPMorgan Chase, Bank of America, and Wells Fargo, though availability can vary by branch. It's advisable to call ahead to confirm if a specific branch offers medallion services and to check their requirements, as they may require an account with the institution. Additionally, many credit unions and investment firms may also provide medallion guarantees.