Is a Seller’s COA or Signing Photo Really Enough? The Truth About Memorabilia Authenticity in the Online Market

The online memorabilia market has never been busier. Platforms such as eBay, Vinted and social marketplaces are full of signed shirts, photographs, footballs and framed displays- many accompanied by a “Certificate of Authenticity” often shortened to a "COA", from the seller or a photo showing a player signing.

At first glance, this feels reassuring. After all, if there’s a picture of the signing, surely the item must be genuine?

Unfortunately, in today’s market, it’s rarely that simple.

As the demand for autographed memorabilia grows, so does the sophistication of fraud. Understanding why third-party authentication matters has never been more important for both buyers and sellers.

The Problem With Seller-Issued COAs

A seller’s Certificate of Authenticity is not, in itself, proof of authenticity. In most cases, a seller COA is simply a statement written by the person selling the item.

There is usually:

• No independent verification

• No examination process

• No accountability beyond the seller’s word

This doesn’t mean every seller is dishonest, many genuinely believe their items are authentic. But belief is not the same as verification. Without independent assessment, a seller COA offers little protection if questions arise later.

The Reality of Modern Forgery

Autograph forgery today is far more advanced than many people realise. Modern forgers study real signatures in detail, replicate stroke patterns, and even mimic natural variations. Some use genuine signing photos as reference points to create convincing reproductions.

Without proper examination and comparison, even experienced collectors can be misled.

This is why professional authentication focuses on:

• Signature construction and flow

• Natural pressure and rhythm

• Ink application and stroke sequencing

• Comparative analysis with known examples

• Signs of tracing, replication or artificial ageing

These are details that photographs and seller statements simply cannot verify.

Why Independent Third-Party Authentication Matters

Third-party authentication removes the conflict of interest.

An independent authenticator:

✔ Has no financial stake in the sale

✔ Applies structured examination methods

✔ Uses reference material and comparative analysis✔ Issues professional opinion separate from the seller

This protects:

• Buyers from costly mistakes

• Sellers from disputes and returns

• The overall integrity of the memorabilia market

Authenticated items consistently sell faster, achieve higher trust, and retain stronger resale value.

Hidden Risks for Sellers Who Rely Only on Their Own COA

Many sellers don’t realise they are also at risk.

Without independent authentication:

• Buyers may dispute items months later

• Platforms may side with buyers in authenticity claims

• Refunds and reputational damage become common

• Repeat business suffers

Third-party authentication isn’t just about proving authenticity, it’s about protecting your credibility as a seller.

A Smarter Way Forward for the Online Memorabilia Market

The market is evolving. Collectors are becoming more informed. Buyers are increasingly sceptical of seller-only COAs and signing photos alone.

Independent verification is quickly becoming the standard rather than the exception.

Just as jewellery is independently appraised and artwork is professionally authenticated, signed memorabilia is moving in the same direction.

Final Thoughts

A seller COA and a signing photo can provide helpful background, but they are not proof on their own.

In a market where forgery is increasingly sophisticated, independent authentication is the only reliable way to establish confidence, protect buyers, and build lasting trust.

Whether you’re a collector investing in a cherished piece or a seller looking to stand out in a crowded market, professional third-party verification is no longer a luxury, it’s becoming essential.