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Expert Signature Authentication, Verified for Life.

We conduct forensic analysis of autographs and handwriting using advanced microscopy, pressure mapping, and comparison with known examples.

Trusted Worldwide

Recognized by top auction houses, high-end galleries, insurance firms, and private collectors across more than 40 countries, ASA's expertise is frequently cited in legal cases, academic research, and the media.

Why Choose ASA?

Forensic Expertise

We perform a detailed analysis of line quality, writing rhythm, ink absorption, and instrument impressions, comparing them to authenticated examples.

Market Acceptance

Our LOA and COA meet the high standards required by leading auction houses, insurers, and legal authorities.

Secure Database

Each certification has a unique code that's permanently recorded and can be verified online anytime.

How It Works

1
Submit: Email details and images to info@www.asa-auth.com.
2
Authenticate: Full forensic examination by our experts.
3
Certify: Receive LOA, COA, or both, with secure online verification.

Verify a Certificate

Instant Online Authentication Check

Enter the unique certificate number printed on your ASA LOA (Letter of Authenticity) or COA (Certificate of Authenticity) to confirm its validity. Our secure database instantly cross-references your number against our permanent certification archive, ensuring the item has been officially examined and authenticated by ASA.

How It Works
  1. Locate Your Number – Your certificate number can be found in the main body section of your LOA or COA, under the "Authentication code" field.
  2. Enter & Search – Input the number into the search field and click "Verify."
  3. View Details – The system will display the authentication record, including item description, certification date, and verification status.
Our Security Commitment

Every ASA certificate is backed by encrypted digital records stored in our secure authentication system. Once issued, records cannot be altered, ensuring transparency and trust for collectors, dealers, and institutions.

If You Cannot Verify a Certificate

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