The Complete Guide to Authenticity Certificates for Artworks

What Is a Certificate of Authenticity and Why Does It Matter?

A certificate of authenticity (COA) is an official document issued by the artist or an authorized party that confirms an artwork is genuine. It serves as a legal record linking a specific work to its creator, providing provenance documentation that protects both the artist and the buyer. Without a certificate, an artwork's value and legitimacy can be questioned at any point in the future.

For collectors, a certificate of authenticity is often a requirement before purchasing. It provides confidence that the work is original, not a reproduction. For artists, issuing certificates demonstrates professionalism and builds trust with buyers. In the secondary market, certificates can significantly affect resale value — works with proper documentation consistently sell for more than undocumented pieces.

What Information Should a Certificate of Authenticity Include?

A comprehensive certificate of authenticity should contain specific elements to be legally and commercially valid. Missing information can render a certificate useless in disputes or authentication challenges. Here is what every professional certificate must include:

• Full name of the artist and signature
• Title of the artwork, date of creation, and unique inventory number
• Medium, materials, and technique used
• Exact dimensions (height x width x depth if applicable)
• A high-quality photograph of the work
• Edition number (for prints or multiples)
• Date of certificate issuance
• Any special notes about condition or provenance

How Does Digital Timestamping Protect Your Certificates?

Traditional paper certificates can be forged, lost, or damaged. Digital timestamping solves these problems by creating a SHA-512 cryptographic proof that a certificate existed at a specific point in time. This technology uses RFC 3161 standards with SHA-512 hashing — the same protocol used in legal and financial documents — to create an immutable record that cannot be backdated or altered.

When a certificate is digitally timestamped, it receives a cryptographic signature from a trusted third-party authority. This means that even decades later, anyone can verify that the certificate was created on a specific date and has not been modified since. This level of verification was previously available only to major auction houses and museums.

What Is the Legal Importance of Authenticity Certificates?

In many jurisdictions, selling artwork without a certificate of authenticity can expose artists and dealers to legal liability. In France, for example, the certificate is considered part of the sale contract and its absence can void a transaction. In the United States, several states have specific laws requiring documentation for art sales above certain thresholds.

Beyond legal compliance, certificates serve as critical evidence in disputes over authorship, ownership transfers, and insurance claims. When a collector files an insurance claim for a damaged or stolen artwork, the certificate of authenticity is typically the first document the insurer requests. Without it, proving value becomes extremely difficult.

How Can QR Codes Enhance Your Certificates?

Modern certificates increasingly incorporate QR codes that link to digital verification pages. When scanned, these codes take the viewer to an online page confirming the artwork's authenticity, displaying its complete history and documentation. This bridges the gap between physical and digital authentication, making verification instant and accessible to anyone with a smartphone.

SEPIALY generates certificates with unique QR codes that link to a dedicated verification page for each artwork. This means a collector, gallery, or auction house can instantly verify the authenticity of any work — no phone calls, no emails, no waiting. The verification page displays the artwork details, artist information, and timestamp proof in a clean, professional format.

How Do You Create Professional Certificates Efficiently?

Creating certificates manually for every artwork is time-consuming and error-prone. Handwritten or poorly formatted certificates can actually undermine your credibility rather than enhance it. The most efficient approach is to use a dedicated system that generates standardized, professional certificates automatically from your artwork data.

With SEPIALY, creating a certificate of authenticity takes seconds. The platform automatically pulls the artwork details — title, dimensions, medium, year, photograph — and generates a bilingual PDF certificate with QR code verification and RFC 3161 digital timestamping using SHA-512 hashing. Every certificate follows professional standards and can be issued individually or in batch for entire collections. This eliminates the tedious manual work while ensuring every piece you sell is properly documented.

Should You Issue Certificates for Every Artwork?

The short answer is yes. Even if you are an emerging artist, issuing certificates for every work you sell (and even for works in your personal collection) establishes good habits and protects your legacy. As your career grows, early works without documentation become problematic — they are harder to authenticate and may be excluded from catalogue raisonne projects.

Issuing certificates is also a mark of respect toward your collectors. It shows that you value their investment and are committed to maintaining the integrity of your body of work. Many artists report that providing a beautifully formatted certificate with each sale enhances the buying experience and leads to repeat purchases.