The Claim Registry · Updated 6 November 2026
How public claims are assessed
The standards fact-checkers use, the rules on advertising, health and green claims, and the regulators that rule on them.
How claims are assessed
- ClaimReview markup explained
What the schema.org ClaimReview type is, its required fields, Google's eligibility rules, and Google's phase-out of ClaimReview in Search in 2026.
- Fact-check rating scales compared
What True, Mostly True, Half True, Misleading, Unproven and Pants on Fire mean at PolitiFact, Africa Check and others, and why some checkers use no scale.
- How fact-checkers assess a public claim
How professional fact-checkers pick a claim, gather evidence, ask the claimant, review the work and publish a verdict, under the IFCN and EFCSN codes.
- The IFCN Code of Principles explained
The five IFCN commitments for fact-checkers, how signatories are assessed and renewed, the US$350 fee, and how it compares with the EFCSN code.
Advertising and product claims
- Advertising claim substantiation: what the rules require
What the US FTC, UK CAP Code, Canada, India, Australia and the EU require before an advertiser makes an objective claim, and who enforces each rule.
- How UK ASA rulings work
How the UK Advertising Standards Authority rules on adverts, what upheld and not upheld mean, when rulings are published and what sanctions follow.
Health and green claims
- Green and environmental claims rules compared
How the EU, UK CMA Green Claims Code, US FTC Green Guides and Australia's ACCC treat eco-friendly, carbon neutral and other environmental claims.
- The EU register of nutrition and health claims
How the EU authorises health claims on food, what the public register lists, EFSA's role, and the rules in Regulation 1924/2006 and Regulation 432/2012.