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What Is a Medallion Signature Guarantee?

A Medallion Signature Guarantee is a special type of certification that confirms a person's signature on financial documents is genuine. Unlike a regular notary public signature, a Medallion Signature Guarantee carries more weight in the financial world and is backed by insurance. When a bank, brokerage firm, or other financial institution stamps a document with a Medallion Signature Guarantee, it means they have verified the person's identity and witnessed their signature in person.

The guarantee serves as proof that the signature belongs to the actual account holder or authorized person. Financial institutions use these guarantees to reduce fraud and protect themselves from losses. The three main Medallion programs in the United States are the Stock Exchanges Medallion Program (SEMP), the Medallion Signature Program (MSP), and the STAMP (Securities Transfer Agents Medallion Program). Each program operates under similar rules but serves different types of financial institutions.

The cost of obtaining a Medallion Signature Guarantee varies by institution and location, but many banks and brokerages offer them at no charge to their customers. The document being guaranteed must involve a financial transaction worth a certain amount, which varies by program. A Medallion Signature Guarantee typically remains valid for one year from the date it is issued, though some institutions may honor it for longer periods depending on their policies.

One important distinction: a Medallion Signature Guarantee is not the same as a notarized signature. A notary public verifies identity and witnesses a signature, but their certification is not backed by insurance. A Medallion Signature Guarantee includes insurance backing, which means if someone commits fraud, the financial institution that issued the guarantee may be responsible for covering losses up to a certain amount.

Practical takeaway: Understanding the difference between a Medallion Signature Guarantee and other signature verification methods helps explain why financial institutions request this specific type of certification for certain transactions. It protects both the institution and the person whose signature is being guaranteed.

When Do You Need a Medallion Signature Guarantee?

A Medallion Signature Guarantee is commonly needed when transferring securities or stock between accounts, particularly when moving investments from one brokerage to another. If you own stocks, mutual funds, bonds, or other securities registered in your name, and you want to transfer them to a different institution, you will likely need this guarantee. The receiving institution requires it as proof that you authorized the transfer and that your signature is legitimate.

These guarantees are also required when making changes to investment accounts, such as updating beneficiary designations on brokerage accounts or retirement accounts. If you want to change who inherits your investments or make significant account modifications, the financial institution may request a Medallion Signature Guarantee to verify your authorization. This protects both you and the institution by confirming that the changes come directly from you, not from someone impersonating you.

Other common situations include transferring securities to a trust, transferring assets as part of estate settlement, selling securities through a different broker than the one holding them, transferring mutual funds between custodians, and authorizing large financial transactions. Real estate transactions involving significant amounts may also require one. Additionally, if you are a corporate officer authorizing the transfer of corporate securities, or if you are acting as a representative of an estate or trust, a Medallion Signature Guarantee may be necessary.

The amount of money involved often determines whether a guarantee is required. Smaller transactions may not require one, while larger ones typically do. The threshold varies by program and institution, but transfers under a few thousand dollars often do not require a Medallion Signature Guarantee. However, to be certain whether you need one for your specific situation, it is best to contact the financial institution handling your transaction directly and ask about their requirements.

Practical takeaway: Before initiating any major financial transaction involving securities or account changes, contact your bank or brokerage and ask specifically whether a Medallion Signature Guarantee is required. This prevents delays and ensures you have the right documentation from the start.

Where to Obtain a Medallion Signature Guarantee

Banks and brokerage firms are the most common places to obtain a Medallion Signature Guarantee. If you have a checking or investment account at a bank or brokerage, contact your branch manager or the service department to ask whether they offer this service. Many larger banks and most full-service brokerages provide Medallion Signature Guarantees to their customers at no cost. Some institutions may charge a small fee, typically ranging from $25 to $100, depending on the complexity of the transaction and the institution's policies.

Credit unions also offer Medallion Signature Guarantees, though not all of them participate in the programs. If you are a credit union member, ask your credit union directly whether they provide this service. Smaller credit unions may not offer it, but many larger credit unions do. If your credit union does not provide the service, they may be able to refer you to another institution that does.

To find participating institutions in your area, you can visit the websites of the three main Medallion programs: SEMP, MSP, and STAMP. These programs maintain searchable directories of participating financial institutions. You can also ask your current bank or brokerage which program they participate in and how to schedule an appointment to obtain a guarantee. Most institutions require you to come in person to verify your identity and have your signature witnessed.

When visiting an institution to obtain a Medallion Signature Guarantee, bring a valid government-issued photo ID, such as a driver's license or passport. You will also need to bring the documents that require the signature guarantee. The financial institution representative will review your identification, verify your account information, and witness your signature on the appropriate documents. The entire process typically takes 15 to 30 minutes, though wait times may vary depending on how busy the institution is.

Practical takeaway: Call ahead before visiting a bank or brokerage to obtain a Medallion Signature Guarantee. Ask whether they offer the service, what documents you should bring, whether there is a fee, and whether you need to schedule an appointment. This saves time and ensures you have everything needed when you arrive.

The Process of Obtaining a Medallion Signature Guarantee

The process begins by contacting the financial institution where you hold an account and requesting a Medallion Signature Guarantee. Explain the purpose of the guarantee and what documents need to be signed. The institution will confirm whether they participate in a Medallion program and whether they can accommodate your request. Some institutions may only serve their own customers, while others may offer the service to the general public, sometimes for a higher fee.

Once you have located an institution that can help, you will need to gather the documents requiring the guarantee. These might include stock transfer documents, beneficiary designation forms, trust agreements, or other financial paperwork. Do not sign these documents before your appointment. The representative at the financial institution will have you sign them in front of a witness, which is part of what makes the guarantee valid.

On the day of your appointment, arrive with your valid government-issued photo identification and the unsigned documents. The representative will ask to see your ID to verify your identity. They will check their records to confirm you have an account with them (if you do) or they may perform additional verification steps. This step is crucial because it ensures the person requesting the guarantee is who they say they are.

The representative will then review the documents you are presenting and explain what you are authorizing by signing. This is not legal advice, but rather a confirmation that you understand what the documents contain. You will be asked to sign the documents in front of the representative, who will then apply the Medallion Signature Guarantee seal or stamp. The representative will typically sign and date the guarantee as well. Some institutions may make copies of your ID and the signed documents for their records.

Practical takeaway: Leave the documents unsigned until you meet with the financial institution representative. Bring your photo ID and all relevant documents to your appointment. Ask the representative how many copies of the guaranteed documents you need and whether they can provide duplicates if you require extras for multiple institutions or records.

Understanding the Guarantor's Responsibility and Insurance

When a financial institution issues a Medallion Signature Guarantee, they are taking on a significant responsibility. They are essentially certifying that they have verified your identity and that your signature is genuine. If it later turns out that fraud occurred, and someone forged your signature or impersonated you, the institution that issued the guarantee may be held liable for losses. This