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What Is a Medallion Stamp Guarantee?

By Motley Fool Staff – Updated Apr 17, 2025 at 12:20AM

Key Points

  • Medallion signature guarantees are for transferring securities, not general use like notarized docs.
  • Only specific financial institutions can issue medallion guarantees, linked to an existing account.
  • Getting a medallion guarantee typically costs, starting at $50 for $100,000 coverage.
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