Understanding & Using the Medallion Signature Guarantee

Date:

Jun 10, 2026

The Medallion Signature Guarantee program is a type of specialized stamp that is typically used (and may be required) for transferring securities such as stocks, bonds, etc. The stamp verifies the signature is authentic and the signer has legal capacity, protecting against forgery. It is obtained at financial institutions that participate in certain programs such as STAMP, SEMP, or MSP. It is generally available for U.S. citizens.