The Jayson Tatum Jersey That Exposed a Solid-Looking eBay Account

This started with one Jayson Tatum jersey.

The eBay listing looked normal enough at first glance: Jayson Tatum SIGNED Boston Celtics Green Nike Authentic Jersey w/ Fanatics COA, priced at $799, sold by rockymountainsportsmemorabilia.

The account did not look like a disposable scam account. The listing page showed Rocky Mountain Sports Memorabilia, 100% positive feedback, and 183 feedback. The sold-search screenshot showed the item located in the United States.

That is exactly why the case matters.

The First Red Flag

The autograph did not look right to me.

The jersey had a Fanatics sticker and a Fanatics-style certificate presentation. The Fanatics lookup page also returned a live result:

A live Fanatics lookup is useful. But that is also the real problem: the lookup tells you the hologram record exists. It does not tell you the marketplace history of the item, who sourced it, where it came from, or whether the autograph in front of you is the original authenticated item tied to that record.

That is the lesson collectors keep learning the expensive way. A certificate number can exist, while the marketplace item using that number still deserves scrutiny.

The inscription close-up was the point where this moved from "odd listing" to "check the history."

What CheckCOA Found

I checked the Fanatics hologram in CheckCOA.

CheckCOA now flags A598877 with a Fraud Alert:

The important part is not just that the cert number overlaps.

For this Tatum jersey, the evidence points to the actual visual item. The same green Celtics Tatum jersey with the same "The Problem" inscription appears in the evidence chain tied to abcsports61.

That is a different level of proof.

There are two categories of evidence in cases like this:

The Tatum jersey is the second category.

Why abcsports61 Matters

abcsports61 is not a random account name in this investigation.

It has already appeared in CheckCOA's China-based autograph fraud mapping, alongside rmcxtysadyk. Those accounts are part of a broader pattern of suspicious jerseys and memorabilia using major authentication brands as trust signals.

In this case, the Tatum jersey appears to have been sourced from that same China-based supply stream and then presented through a more respectable-looking U.S. seller account.

That changes how buyers should read the listing.

This no longer looks like one questionable Jayson Tatum autograph.

It looks like a downstream seller account carrying inventory from the same China-based fake autograph supply chain already documented in earlier CheckCOA cases.

The Account-Level Pattern

After the Tatum jersey, I checked the rest of the account.

CheckCOA's network-overlap report for rockymountainsportsmemorabilia captured:

Provider breakdown:

Top captured athletes included Patrick Mahomes, Stephen Curry, Nikola Jokic, Randy Moss, and Julius Erving.

The connected sellers are the key:

The shared-cert list includes:

That is not normal collector inventory.

Different sellers. Same certs. Same high-demand athlete mix. Same China-network overlap.

The Trust Signal Trap

The dangerous part is the packaging.

To an ordinary buyer, rockymountainsportsmemorabilia does not look like a fresh China seller dumping obvious fakes. It looks like a normal eBay memorabilia account with positive feedback and U.S. item locations.

That is the trust signal trap:

• the seller account looks solid;

• the item location looks domestic;

• the certificate brand is recognizable;

• the cert lookup may return a live record;

• the buyer stops there.

But the deeper evidence points in the other direction.

The Tatum jersey connects back to abcsports61. The broader account inventory overlaps with abcsports61, rmcxtysadyk, and libisports_242. The account uses Fanatics, Beckett, and JSA trust signals on high-demand names.

This is why CheckCOA tracks seller history and certificate reuse, not just whether a number exists on an authenticator website.

Caveats

There are a few limits to state clearly.

Public eBay sold history is incomplete. Older sales can disappear from the visible sold-listing window, commonly around 90 days.

The Fanatics lookup confirms that A598877 returns a Jayson Tatum jersey record. It does not, by itself, prove the eBay jersey is authentic.

The public screenshots do not prove who controls each seller account. They show item, certificate, and seller-network evidence. eBay and law enforcement have access to the private records needed to answer control, sourcing, shipping, and payout questions.

Some account-level prices in raw scraper data can be placeholders or imperfect captures. The article uses the CheckCOA report screenshot for the account-level snapshot.

Buyer Advice

Do not stop at the sticker.

Do not stop at a 100% feedback score.

Do not stop at a domestic item location.

For modern autograph memorabilia, especially jerseys with Fanatics, Beckett, JSA, PSA, or similar trust signals, check whether the same cert number appears with other sellers. Check whether the same item appeared earlier from a high-risk source. Check the seller's broader inventory, not only the listing you want to buy.

The Tatum jersey shows why this matters.

One suspicious autograph led to a Fanatics cert, then to a prior abcsports61 source, then to a 30-cert account-level pattern connected to known China-based sellers.

Verify before you buy: https://checkcoa.com