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Signature Guarantee & Validation Services

As a current member of the Securities Transfer Agents Medallion Program (STAMP), Union Bank & Trust offers the Medallion Signature Guarantee (MSG) service to our customers involved in securities-related transactions. For transactions that involve a non-securities event, we offer the Signature Validation Program (SVP) stamp for our customers. The MSG and SVP stamps require specific documents to authenticate your identity.

Required Documents

To obtain a MSG or SVP, you will need to present the following documents:

  • Your photo identification.
  • Proof of name change as a result of marriage, divorce or legal name change.
  • Documentation showing the exact and complete ownership of the security.
  • Documentation showing the value of the transaction (valuation is not needed for the SVP stamp as it is used for non-securities related events).
  • If you are signing on behalf of another individual, documentation showing your legal authority.

These documents are required to protect both parties in a securities transaction. By providing the Signature Guarantee, Union Bank & Trust is validating that:

  • Your signature is genuine.
  • You are the appropriate person to endorse the document.
  • You have the legal capacity to sign the document.
  • By ensuring your signature is genuine, you are protected from the threat of unauthorized individuals accessing your funds by forging your signature on your securities certificates or related documents. 

Common Questions

When do I need a Signature Guarantee?

If you hold securities in physical certificate form and want to transfer or sell them, you will most likely need a Signature Guarantee before a transfer agent will accept the transaction. Securities transactions include Stocks, Bonds, Mutual Funds and legal documents in connection with the sale or transfer of ownership of these assets. Any other transaction that does not include a security related event can be Signature Validated.

Can I obtain a Signature Guarantee even if I am redeeming an asset that is not a Security?

No. If a company requests that you obtain a Signature Guarantee for an asset not involved in a securities-related transaction, we will be unable to fulfill the request. You may have the company requesting the Signature Guarantee contact us so we can explain the specific requirements of this type of documentation to them directly, and help determine the correct type of documentation for that particular asset. However, we do offer the SVP stamp for non-security related events.

What is the Signature Validation Program (SVP) stamp?

The SVP began as a answer to many improper requests from commercial entities that wanted the effectiveness of the MSG but were for non-securities related events. The SVP stamp bridges the gap between the MSG and a Notary Stamp.

What is a Non-Securities Event?

A Non-Securities Event is any transaction/event that does not pertain to a sale, assignment, transfer or redemption of a security. The SVP stamp can be used for Non-Securities events.

Is there a fee to get a Signature Guarantee/Validation?

Yes, a fee will be charged for providing the Medallion Signature Guarantee and Signature Validation Program services (currently $50.00).
Who can provide a Signature Guarantee or Signature Validation?
You can obtain a Signature Guarantee or Validation from Union Bank & Trust or another financial institution – a commercial bank, savings bank, credit union, or broker dealer – that participates in one of the Medallion Signature Guarantee programs. Authorized Union Bank & Trust employees who provide the Signature Guarantee service are required to complete a
certification program.

May I send a signed document through the mail to obtain a Signature Guarantee or Validation?

No. We must warrant that the signature is genuine at the time of signing. Therefore, we request you sign the document in the presence of an authorized Union Bank & Trust employee.

I own the security jointly with someone who lives in another state. How can we guarantee both signatures?

You may sign a Specific Power of Attorney for multiple security owners. We will affix the Medallion Signature Guarantee on this document for you to then forward to your co-owner living in another state.

Why do you ask for additional documents when all I need is my signature guaranteed?

In addition to guaranteeing your signature, we are also validating:

  • You are the appropriate person to endorse the document.
  • You have the legal capacity to sign the document.
  • Therefore, we need documentation showing the owner(s) of the security. If you are acting on behalf of someone, we must have documentation showing your legal authority. 
Why do you need to know the value of the transaction for the Medallion Signature Guarantee?

Our surety bond limits the value of the transaction we are permitted to guarantee. If we guarantee an amount over our limit, you would not be adequately protected.

Why are there so many requirements for obtaining a Signature Guarantee or Validation?

Issuers of securities and Transfer Agents rely upon the Signature Guarantee/Validation process for the transfer of securities. The Transfer Agent is liable for improper securities registration, but cannot witness you signing your documents or review the documentation showing your legal authority and capacity to sign the documents. The Signature Guarantee/Validation provides this service as well as protecting the individual signing the securities from fraudulent action.


Signature Guarantee services are available by appointment at several Union Bank & Trust locations. For the nearest location of an authorized employee, please contact our Customer Support Team at 402.323.1777 or 800.297.2837.