How to check if a football shirt is authentic before you resell it.

1. Start with the exact claimed identity

Write down the team, season, manufacturer, home/away/third status and whether the seller is claiming retail, authentic/player version, player issue or match worn. Authentication becomes unreliable when the target identity keeps changing during the check.

2. Check the manufacturer product or style code

On many modern Adidas, Nike, Puma and other branded shirts, the internal label includes a manufacturer code. Search that exact code and confirm it belongs to the claimed shirt and garment version. A code that belongs to another team, season or product is strong negative evidence.

A matching code is not proof by itself. Counterfeit factories can copy genuine codes, so the physical shirt still needs to agree with the code result.

3. Make sure the labels fit the era

Look at neck labels, printed size details, wash labels, manufacturing country, care-label layout and brand marks. A shirt claimed to be from the early 2000s should not carry a clearly modern label system without a good explanation such as an official reissue.

4. Compare construction, not just the graphic design

Check badge shape and stitching, sponsor application, collar construction, sleeve panels, fabric texture, ventilation zones, hems and trim. Counterfeits can copy the overall colour blocking while missing small construction details.

5. Separate period originals from licensed reproductions and reissues

A licensed Score Draw, TOFFS or other retro reproduction can be a genuine licensed product without being an original period shirt. Official modern reissues also need their own classification. For resale, “genuine licensed reproduction” and “original 1990s shirt” are different products with different buyer expectations and values.

6. Treat namesets, sleeve patches and restoration separately

A genuine base shirt can have an aftermarket nameset, replaced sponsor or later-added patch. That does not automatically make the shirt itself fake, but it can materially change collector value. Describe restoration and aftermarket additions clearly.

7. Use seller photos that prove the physical details

For a remote purchase, ask for the full front and back plus close photos of neck details, wash/product-code labels, badge, sponsor and any suspicious area. Avoid authenticating from catalogue images or a seller’s first photo alone.

8. Let uncertainty stay visible

If labels are missing, the product code is unreadable, photos conflict or the design does not match known references, the correct outcome may be “unresolved”. That is more useful to a reseller than forcing a confident genuine/fake verdict from weak evidence.

9. Value the shirt only after provenance and condition are clear

Resale value can change with size, sleeve length, nameset, player association, competition patches, sponsor condition, cracking, pulls, repairs and rarity. Compare the same shirt type and similar condition rather than applying the price of a cleaner or more collectible example.

10. Know when to use a specialist

Match-worn, player-issue, signed and very high-value shirts may need provenance documents or specialist human review. Software and photo evidence can narrow the risk but cannot physically inspect hidden construction or prove match use.

A practical buying checklist

• Exact team, season and shirt version confirmed.
• Product/style code checked where applicable.
• Labels consistent with the claimed era.
• Badge, sponsor, fabric and construction consistent.
• Original vs reproduction vs reissue classified correctly.
• Nameset/patch/restoration status described separately.
• Condition defects included in the resale calculation.
• No unresolved contradiction hidden behind a high confidence score.