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For buyers

Verify a condition grade before you buy

Buying pre-owned clothing on eBay, Poshmark, Mercari, Depop, or in person? If the seller graded it with GradeThread, you can confirm the condition for yourself — the grade, the factor breakdown, and the actual garment photos. It's free and takes no account.

The certificate number is printed in the listing (e.g. “Cert #GT-7K2M9”). On a phone, you can also point your camera at the QR code on the item's GradeThread tag.

How to verify a grade

  1. 1

    Scan the QR code or open the certificate link

    Every GradeThread certificate carries a QR code and a unique link. Scan the code on the listing, badge, or item tag with your phone camera, or tap the seller's certificate link.

  2. 2

    Or enter the certificate code

    No link handy? Paste the certificate URL or its code into the verify box on gradethread.com/verify to pull up the official certificate.

  3. 3

    Check the grade against the photos

    The certificate shows the overall 1.0–10.0 grade, its tier, a factor-by-factor breakdown, and the actual garment photos — so you can confirm the condition matches what you're buying.

  4. 4

    Confirm it's authentic

    Each certificate is tamper-evident: GradeThread re-derives its integrity signature on load and shows a verified check, so you know the grade hasn't been altered.

A GradeThread certificate isn't tied to eBay — the same QR code and link verify the grade on any marketplace and for face-to-face sales.

Why a verified grade matters

An independent grade, not the seller's word

Every grade is produced by GradeThread against one published 1.0–10.0 rubric — so 'Excellent' or '8/10' means the same thing no matter who is selling.

Tamper-evident certificates

GradeThread re-derives each certificate's integrity signature when it loads. If a grade were altered, the check fails — so the number you see is the number that was graded.

See the proof yourself

The certificate shows the factor-by-factor breakdown and the actual garment photos, so you can confirm the condition matches the listing before you pay.

New to condition grades? See what the 1.0–10.0 scale and seven tiers mean, read the grading standard, or check our published accuracy & transparency report.

Sell with verified grades

Frequently asked

How do I verify a GradeThread grade as a buyer?
Scan the QR code on the listing or item, open the seller's certificate link, or paste the certificate URL or code at gradethread.com/verify. The official certificate shows the grade, factor breakdown, and garment photos so you can confirm condition before you pay — no account needed.
Does this work for Poshmark, Mercari, Depop, or an in-person sale?
Yes. A GradeThread certificate isn't tied to eBay. The QR code and verify link work on any marketplace and for face-to-face sales — scan or open it from wherever the seller shared the grade.
How do I know the certificate is genuine and not edited?
Certificates are tamper-evident. When a certificate loads, GradeThread re-derives its content hash and signature on the server and displays a verified check. An altered grade fails that check, and a certificate that was withdrawn or never existed simply won't resolve.
Do I need an account to verify a grade?
No. Verifying a grade is free and requires no login. Only the seller who graded the item needs a GradeThread account.

Sell items buyers can trust

Grade your pre-owned clothing with GradeThread and give every buyer a certificate they can verify in seconds.

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