What credit unions have a medalion signature stamp?

Medallion signature guarantee services are typically offered by credit unions that are members of the Medallion Signature Guarantee program. Specific credit unions may vary by region, but many larger institutions, such as Navy Federal Credit Union and the State Employees' Credit Union, often provide this service. It's best to check directly with your local credit union or their website to confirm if they offer medallion signature guarantees and any associated requirements.