Is a Certificate of Authenticity enough?

A COA is only as credible as its issuer. A COA from a recognized third-party authenticator (PSA, JSA, Beckett, etc.) carries real weight. A COA from the seller, dealer, or in-store signing event is much weaker, even when it's legitimate.

How much does authentication cost?

Fees vary by service, category, declared value, and turnaround. As a rough range, expect $20–$100 per item for autograph authentication at standard service levels, with rush tiers costing significantly more. Grading typically starts around $20–$30 per item but can scale to hundreds for high-value submissions.

Will authentication always increase value?

Authentication usually raises the realized price more than its cost when the item's expected value is several hundred dollars or more. Below ~$200, the math often doesn't work.

What's the difference between grading and authentication?

Grading evaluates condition on a numeric scale (e.g. PSA 9). Authentication verifies identity. Some services do both; some do one or the other. They are not interchangeable.

Cornerstone guideAuthentication

How to Authenticate Memorabilia Before You Buy or Sell

Why third-party authentication exists, who serious buyers trust, and how to prepare an item for submission.

Published February 18, 2026Updated May 20, 20263 min read

Short answer

Authentication is a third party verifying that an item is what the seller claims it is. The certificate is only as good as the verifier — PSA, JSA, Beckett (BAS), SGC, and CGC are the names most major buyers and auction houses recognize.

Authentication is the single highest-leverage variable in memorabilia. The same physical object — unchanged ink, unchanged fabric, unchanged paper — can sell for 3–10x more once a trusted third party stamps it as real. This guide explains how the system works, who it works through, and how to prepare an item so authentication is fast and conclusive.

What authentication actually is

Authentication is a third party giving its documented opinion that an item is what the seller claims. It is not:

Grading — a numeric condition score.
Appraisal — a value estimate for insurance or sale.
A private COA — a certificate from the dealer or signing event, which is only as good as the issuer.

The third party can issue a Letter of Authenticity (LOA, often long-form) or an authentication slip referenced to a sticker, hologram, and online database. The key isn't the format. The key is whether the buyer recognizes the verifier.

Why third-party authentication exists

Most memorabilia is unique — one specific signature on one specific surface, one specific game-worn jersey, one specific screen-used prop. Buyers can't inspect items in person, can't verify event provenance, and won't spend serious money on “the seller says it's real.” Third-party authentication exists to give buyers a verifier they already trust. The result: faster sales, higher prices, and lower dispute risk.

Who serious buyers recognize

The list isn't long. The names below are the ones most major auction houses, marketplaces, and serious buyers recognize. See the authentication services comparison for current details.

Recognized authenticators by category
Service	Strongest in
PSA / PSA/DNA	Trading cards (PSA), autographs (PSA/DNA)
JSA	Autographs — sports, entertainment, historical
Beckett (BAS / BGS)	Cards (BGS), autographs (BAS)
SGC	Vintage trading cards
CGC	Comic books, trading cards (CGC Cards), magazines

A COA from any of the above is qualitatively different from a COA issued by an in-store signing event, a one-person dealer, or a celebrity's management company. Both can be legitimate; the market doesn't treat them the same.

How to prepare an item for submission

Authenticators work faster, and with more confidence, when you provide context. Before submitting:

Authentication prep checklist

Photograph the item from every angle, including the signature or markings at high resolution.
Photograph any flaws, damage, or repairs honestly.
Write a one-paragraph provenance story: where, when, from whom.
Gather any supporting documentation — receipts, photos of signing events, prior LOAs, family records.
Confirm the service offers your category and current turnaround.
Pack the item rigidly with edge protection and ship with insurance + signature confirmation.

Use our Authentication Readiness Checklist tool to score how prepared an item is before paying.

Grading vs authentication, in one paragraph

Grading is a numeric condition score, almost always for items that fit in a sealed case (cards, comics). Authentication verifies identity, typically for items that don't fit a numeric scale (jerseys, autographs, props). PSA and Beckett offer both for cards. JSA focuses on autograph authentication. CGC focuses on comic grading. For more detail, see our grading explainer.

What authentication can't do

Authentication is one of the strongest signals in the market — and it still can't do four things:

Tell you what the item is worth.
Reverse a fundamental forgery beyond the service's expertise.
Cover items the service doesn't specialize in.
Guarantee a sale.

Authentication exists alongside grading, appraisal, and comparable-sales research. It doesn't replace them.

When authentication is worth the cost

A rough rule, with significant variance by category:

Below ~$200 expected sale price: authentication usually loses money.
$200–$1,000 expected: authentication usually wins, especially for marketplace listings.
$1,000+ expected: authentication is almost always worth it; major auction houses may require it.
Anything signed by a major figure: authenticate before listing, regardless of price.

If you're unsure, run the Selling Route Finder — for higher-value items it will route you toward auction or consignment, where authentication will be part of the conversation anyway.