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Expert Signature Authentication, Verified for Life.

Forensic examination of autographs and handwriting using advanced microscopy, stroke-pressure mapping, and exemplar comparison.

Trusted Worldwide

Recognized by leading auction houses, blue-chip galleries, insurance companies, and private collectors in over 40 countries. ASA’s opinions are cited in legal proceedings, academic research, and media publications.

Why Choose ASA?

Forensic Expertise

Detailed assessment of line quality, writing rhythm, ink absorption, and instrument impressions, benchmarked against authenticated exemplars.

Market Acceptance

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

Secure Database

Each certification is assigned a unique code, permanently recorded and verifiable online.

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 "Certification 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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