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The Daily Horizon

Can you medallion guarantee your own signature?

Author

Christopher Martinez

Published Jan 04, 2026

Signature guarantees can only be provided by members of official securities guarantee programs like Medallion.

What do you need to get a medallion signature guarantee?

The documents typically required for a signature guarantee include two forms of identification, one of which must be a photo ID; proof of ownership of the shares you’re selling, such as a recent account statement from your broker; and a document showing the current value of the shares.

Who can provide a Medallion signature guarantee?

Banks, credit unions, broker dealers, and other financial firms that are members of a medallion program can provide one. A bank officer stamps it on your transfer form near your signature, and signs his or her own name over the stamp.

Do you need a NYSE medallion signature guarantee?

Signature guarantees from financial institutions that do not participate in either Stamp or NYSE Medallion program are not accepted. It is worth noting that a notary public is not bound to produce a medallion signature guarantee when transferring stocks.

Where does the name medallion signature guarantee come from?

The name comes from the imprint stamp in the form of a medallion used to show that the guarantee is of the acceptable type. The financial institution where you get the guarantee will be a member of a Medallion Signature Guarantee Program.

Do you need a signature guarantee for a stock certificate?

The signature guarantee for your stock certificates must be what is called a Medallion signature guarantee.

What are the benefits of a medallion signature?

A medallion signature provides a guarantee that a signature’s owner is the legal owner of securities and hence, possesses the power to initiate a transfer of ownership. In the case of forgery, the financial institution will accept liability.