A Medallion Signature Guarantee is a specialised financial authentication used by U.S. and Canadian transfer agents to prevent fraudulent securities transfers. It is not a general certification service.

The term “signature guarantee” is often confused with other forms of certification, such as:

• A notarial certification
• A solicitor’s certification
• A bank stamp available on request

Only approved institutions in recognised Medallion programs can issue a Medallion Signature Guarantee. Not all banks participate, and those that do may limit the service to specific clients.

What a Medallion Signature Guarantee is and is not.

Recognising these differences early helps avoid unnecessary applications and rejections.

Common reasons Medallion applications are delayed or rejected

Delays most often occur due to:

1. Applying through the wrong institution

Many banks offer Medallion services only to existing customers with certain account types. Walk-in requests are usually declined.

2. Incorrect assumptions about document requirements

Transfer agents often require supporting documents to be reviewed before issuing a Medallion. Applying for the Medallion first can lead to rejection.

3. Uncertainty around acceptance of postal services

Some Medallion services must be completed in person, while others accept postal options universally. In practice, acceptance depends on both the issuing institution and the receiving transfer agent.

4. Mismatch between transaction value and coverage

Medallion stamps have different coverage limits. Using a stamp with insufficient coverage may invalidate your submission.

In-person vs post-based Medallion services

International clients may have limited access to in-person Medallion services. In some cases, secure post-based services are available if:

• Identity verification requirements are met.
• Supporting documentation is reviewed in advance.
• The transfer agent confirms acceptance.

The primary consideration is whether the process meets the receiving institution’s requirements, not the service method.

What documents are typically required

While requirements vary by case, documentation often includes:

• Government-issued identification
• Evidence of authority (such as probate or estate documentation)
• Transfer forms issued by the transfer agent
• Supporting estate or ownership documentation

Incomplete or incorrect documentation is a leading cause of repeated requests and delays.

When professional guidance makes the difference

Many clients seek help only after several unsuccessful attempts to obtain a Medallion. Early guidance can:

• Confirm whether a Medallion is actually required.
• Identify the correct route before signing the documents.
• Reduce the risk of rejection by the transfer agent.
• Shorten the overall administration timeline.

For advisers managing cross-border estates or U.S. securities, early clarity can significantly reduce client difficulties.

Next steps

If a Medallion Signature Guarantee is needed, it is essential to understand the process before submitting documents. Assess each case individually to confirm eligibility, documentation, and acceptance criteria.

Early, clear guidance helps prevent delays and ensures transactions proceed smoothly. If you are unsure whether a Medallion is required, which documents are needed, or whether a post-based option may be suitable, contact us so our team can review your situation and confirm the correct next steps before submitting documents.