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Fact-Checker Toolkit

The fact-checker is the newsroom last line of defence for accuracy. Whether you check copy before publication, verify viral claims or build a culture of accuracy across a desk, your job is to trace every claim to a primary source and stop the inaccurate one before it goes out. This toolkit covers verification workflows, IPSO Clause 1 obligations and the UK fact-checking landscape.

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What the fact-checker does

A fact-checker is a verification specialist who confirms that what a piece asserts is actually true before it is published. In some newsrooms that is a dedicated pre-publication role checking long-form and investigative work line by line; in others it is a verification desk assessing viral claims and misinformation for a live audience. Either way, the discipline is the same: separate the checkable claims from the framing, trace each one to a primary source, and refuse to let anything unverified pass as fact.

The work is grounded in the accuracy obligation that regulation and reputation both demand. The verification workflows guide and the IPSO Editors Code are the foundations of the role.

A typical checking workflow

Pre-publication or reactive, a check moves through the same disciplined stages.

  1. 1
    Isolate the claims. Read the piece and mark every checkable assertion: names, dates, figures, quotes, characterisations and the headline and captions.
  2. 2
    Find the primary source. Trace each claim to its origin document or authoritative body rather than an earlier article that merely repeats it.
  3. 3
    Triangulate. Confirm contested claims from at least one independent source, weighing each for reliability and motive.
  4. 4
    Check the visuals. Verify image and video provenance with reverse search and detail cross-referencing, and screen for manipulation.
  5. 5
    Query and resolve. Flag anything that cannot be stood up to the writer and editor to correct, attribute precisely, soften or cut.
  6. 6
    Record the check. Leave a note of what was verified, what was queried and what remains outstanding, so the decision can be defended.

Core skills

Claim isolationSeparating the checkable facts from framing, opinion and rhetorical flourish.
Primary-source tracingFinding the original document or authoritative body behind any assertion, not a repeat of it.
Source triangulationConfirming claims from genuinely independent sources and weighing reliability and motive.
Image and video forensicsReverse search, provenance checks and spotting manipulated or synthetic media.
Regulatory literacyApplying IPSO Clause 1 accuracy duties to headlines, captions and body copy alike.
Building a checking cultureEmbedding verification habits and clear escalation so accuracy is a routine, not a rescue.

Key accuracy and ethical risks

  • 1
    Circular sourcing. Several outlets repeating one original claim is a single source dressed as many. Always trace back to the primary document before treating a widely repeated assertion as confirmed. The verification workflows guide sets out how.
  • 2
    Checking the body but not the headline. Under IPSO Editors Code Clause 1, headlines and captions must be accurate too. A distorted headline over an accurate story is still a breach, so check the framing as rigorously as the copy.
  • 3
    Trusting a compelling image. Striking visuals spread fastest and are the most likely to be recycled, miscaptioned or synthetic. Verify provenance and screen for manipulation before publication. See deepfake and forensic image analysis.
  • 4
    Amplifying misinformation while debunking it. Repeating a false claim prominently can spread it further than the correction. Lead with the accurate position and handle user-generated claims carefully — see using user-generated content.

Curated guides for fact-checkers

Verification workflowsThe core discipline of source, corroboration and documentary checks.IPSO Editors' CodeClause 1 accuracy duties covering headlines, captions and copy.Deepfake and forensic image analysisDetecting manipulated and synthetic images and video.Using user-generated contentVerifying, crediting and safely handling eyewitness media and social posts.Verification for breaking newsStanding up fast-moving claims under deadline without cutting corners.OSINT toolkitOpen-source research techniques for confirming claims and locations.Geolocation techniquesPinning down where and when an image or video was really captured.Source verification standardsCorroboration and documentation requirements for unnamed sources.

Tools for fact-checkers

Source Verification Checklist
A 12-question yes/no checklist to verify a source, with a readiness rating at the end.
Headline Checker
Test headlines and captions for absolute claims and IPSO Clause 1 accuracy problems.
All interactive tools
The full set of verification and pre-publication tools on UK JournoHub.

Templates that save you time

Editor Standards PackCorrections policy, editorial policy and house-style starter to underpin a checking culture.Media Law Risk PackPre-publication accuracy checklist and right-of-reply letter for pieces that name people.

FAQs for fact-checkers

What does a pre-publication fact-check actually involve?
A pre-publication check verifies a piece against its evidence before it goes out, not after a complaint arrives. Working line by line, the fact-checker confirms every checkable claim: names spelled correctly, titles and dates right, figures matching their cited source, quotes accurate and in context, and any characterisation supported by the material. Each fact is traced to a primary source rather than an earlier article, and anything that cannot be stood up is flagged to the writer and editor to fix, soften or cut. The output is a marked-up piece and a short note recording what was verified, what was queried and what remains outstanding.
How does IPSO Clause 1 shape a fact-checker's job?
Clause 1 of the IPSO Editors Code is the accuracy backbone most UK publishers work to. It requires that the press takes care not to publish inaccurate, misleading or distorted information, including headlines and images, that a significant inaccuracy is corrected promptly and with due prominence, and that comment is distinguished from fact. For a fact-checker that translates into concrete duties: check the headline and captions as rigorously as the body, make sure figures and claims are not distorted by omission, and confirm that opinion is clearly flagged. Building the check around Clause 1 keeps the work aligned with the standard a complaint would later be judged against.
How do I verify a viral image or video?
Start with provenance: find the earliest version of the image, not the one in front of you. A reverse image search can surface older uses that reveal a photo is recycled or miscaptioned, and checking the account that posted it for history and location helps establish authenticity. Cross-reference visible details such as signage, weather, shadows and landmarks against maps and independent reports to confirm where and when it was taken. For suspected manipulation or synthetic media, apply forensic image analysis and treat anything you cannot verify as unconfirmed. Never publish a striking image on the strength of how compelling it looks.
What is the UK fact-checking landscape I should know about?
The UK has a mature fact-checking scene. Full Fact is the best-known independent charity, checking claims in public debate and campaigning on standards in the use of statistics. Internationally, the International Fact-Checking Network at the Poynter Institute runs a code of principles that signatory organisations commit to on non-partisanship, transparency of sources, funding and methodology, and an open corrections policy. Broadcasters and major publishers also run their own checking desks. Knowing this ecosystem helps you cite authoritative checks, understand the standards reputable fact-checkers hold themselves to, and route viral claims to the organisations best placed to assess them.
How do I triangulate sources and handle a claim I cannot confirm?
Triangulation means confirming a claim from multiple independent sources that do not all trace back to the same origin. Two outlets repeating one press release is a single source, not two. Seek at least one primary document or authoritative body alongside any human source, and weigh each source for reliability and motive. When a claim cannot be confirmed, the honest options are to hold it, attribute it precisely to who is asserting it while making the uncertainty clear, or drop it. What you must not do is launder an unverified claim into a stated fact. Record what you checked so the decision can be defended later.

Career path and progression

Dedicated fact-checking roles are common in magazine and long-form journalism and on the verification desks that broadcasters and major publishers run for elections and breaking news. Fact-checkers frequently move into investigative reporting, where the same forensic instinct drives original stories, or into standards and editorial-quality roles that set accuracy policy across a newsroom. Independent organisations such as Full Fact also offer a route into full-time fact-checking outside a traditional newsroom.

The verification skillset transfers widely, from data journalism to open-source investigation. If you are considering a related path, compare the investigative reporter, data journalist and editor toolkits.

The reference points and organisations every fact-checker should know.

Primary sources

Where to next

The Investigative Journalism hub deepens the verification and open-source skills fact-checking runs on, while the Ethics hub anchors the accuracy and sourcing standards you enforce. For interactive checks, head to the tools.

Go to verification workflows →

Related guides

InvestigativeVerification WorkflowsRead →InvestigativeDeepfake & Forensic Image AnalysisRead →EthicsIPSO Editors' CodeRead →PersonasData Journalist ToolkitRead →ToolsInteractive ToolsRead →