Medallion Signature Guarantee

A Medallion Signature Guarantee is a guarantee by Premier Source Federal Credit Union that the signature is genuine. A Medallion Signature Guarantee can protect shareholders by preventing unauthorized transfers and possible investor losses. You may need a Medallion Signature Guarantee if you’re selling, redeeming or transferring your securities such as stock or mutual funds.

Medallion Signature Guarantee services can be found at our 232 North Main Street, East Longmeadow, MA branch.

Please call 413.525.2002 to schedule an in-branch appointment.


Medallion Signature Guarantee Requirements


  • Each person requiring their signature to be guaranteed must be a member of Premier Source Federal Credit Union.
  • There must be an ongoing (established member in good standing) relationship between the Member and the credit union in order to perform a signature guarantee.
  • Account must be in good standing.
  • 2 forms of ID
    • Primary:  Driver's License, Passport, Permanent Resident Card-Green Card
    • Secondary:  Current Credit Card Bill - showing current address, Social Security Card, Employee ID with picture and signature
  • Proof of securities ownership (All owners should be present)
    • Statement
    • Actual stock certificate
  • Proof of Value
    • Premier Source Federal Credit Union is limited to guarantee signatures for $100,000 in value
  • Verification of legal right to sign (Original or Certified copy)
    • Death Certificate with court issued Executor appointment
    • Trust Agreements
    • Corporate Resolution
    • Power of Attorney
    • Additional documentation may be required
    • Guardianship over Estate with court appointment


Click to Download: Medallion Stamp Customer Checklist