AI is now used to generate counterfeit autographs (especially deceased players), reproduce vintage card printing patterns, and forge dial signatures on watches. Authentication services are responding with multispectral imaging, chemical analysis, microscopic fiber comparison, and provenance database cross-referencing. For collectors: AI fakes are detectable, but only by professional services — DIY authentication is increasingly unreliable for high-value purchases.
The 2024-2026 Counterfeit Revolution
Until roughly 2022, counterfeit collectibles required either bulk operations producing low-quality fakes (easy to detect) or skilled craftsmen producing one-off high-quality fakes (limited in volume). AI has collapsed this distinction. Generative models can now produce convincing “limited edition” autographs in seconds, and image-to-image models can reproduce period-accurate printing imperfections that previously required extensive forgery experience.
Categories Most Affected
Autographs of Deceased Players and Public Figures
The hardest-hit category. Autographs of Babe Ruth, Mickey Mantle, Lou Gehrig, Princess Diana, and other deceased celebrities can be generated by AI models trained on hundreds of authenticated samples. The output captures pressure variations, slant, and signature evolution by year — features previously considered authentication tells. JSA and PSA/DNA have responded with mandatory provenance documentation requirements for any deceased-celebrity autograph claiming to be authentic.
Watch Dials
AI-driven CNC machining and dial-printing services can now reproduce period-accurate Rolex, Patek, and Omega dial layouts including subtle font irregularities, lume aging, and printing register variations. The 2024 emergence of “factory-correct” service dials (legitimate replacements) muddied the market further. Authentication now requires movement, case, and dial verification together — single-component verification is insufficient.
Trading Cards
“AI proxies” — high-quality reproduction cards that include stochastic micro-variations to mimic factory printing — have emerged in 2024-2026. While most still fail under expert microscopic examination, casual collectors and even some grading-service-level scrutiny can be fooled. PSA introduced new authentication protocols in late 2024 specifically targeting AI-generated reproductions.
How Authenticators Respond
Multispectral Imaging
UV, infrared, and X-ray fluorescence imaging reveal ink and paper compositions invisible to the human eye. Period-authentic ink chemistry is essentially impossible to replicate at home; authenticated samples show specific spectral signatures that AI-generated fakes lack.
Microscopic Fiber Analysis
Genuine vintage cards, paper documents, and printed materials show specific paper-fiber characteristics from period manufacturing processes. Modern reproductions — even high-end ones — use different paper substrates that fail under fiber analysis.
Provenance Database Cross-Referencing
Items now require documented chain-of-custody from established collectors, dealers, or auction houses. The PWCC Provenance Project, Heritage’s collection-history database, and PSA’s auction-tracking system identify items that “appeared” in the market without verifiable history.
Blockchain Verification
Despite the broader NFT crash, blockchain-based provenance tracking continues quietly gaining traction for high-value pieces. Heritage Auctions and select dealers issue NFT certificates that don’t grant ownership but do create immutable provenance records for future authentication.
What Collectors Should Do
For purchases under $500: traditional self-education suffices. Visual comparison, weight checking, and basic loupe examination catch the majority of low-quality fakes.
For purchases $500-$5,000: third-party authentication is now essentially mandatory. PSA, BGS, CGC, JSA, BBCE, and category-specific authenticators (e.g., Bobs Watches, Hodinkee for watches; Rare Book Hub for books) provide professional-grade verification at $20-$200 per item.
For purchases over $5,000: layered authentication. Independent expert opinion, grading service certification, and verified provenance documentation should all be present. For purchases over $25,000, consider 2-3 independent expert opinions and have legal contingencies for authentication challenges.
The Long-Term Outlook
The arms race between counterfeiters and authenticators will continue. Authenticators currently hold the advantage because they have institutional knowledge, equipment, and reference databases that AI alone cannot replicate. However, the “easy” middle ground of AI-fooled-but-not-authenticated items has expanded substantially. The collector takeaway: trust verified authentication services, not your own eye, for any meaningful purchase.