Expertise / Sports / Forensic document examination
Forensic document examination expert witnesses
Evidence on whether a contract, signature or document in a sports dispute is genuine.
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Player contracts, agency agreements and transfer documents are often signed in a hurry, in several versions and sometimes in more than one country. When a party says a signature was forged or a page was added later, the case can turn on a forensic document examiner's analysis of the handwriting, the printing and the document itself.
This is one of the specialisms within our sports expert witness practice.
In sports, the difference between a strong case and a weak one often comes down to whether the expert truly understands the sector. Generalist opinion rarely survives scrutiny on specialist questions, and a tribunal gives little weight to evidence that misreads how sports actually works. We focus here precisely because the issues are technical, the stakes are high, and the wrong expert is an expensive mistake.
What instructing through us looks like
Tell us the issues, the forum and your timeline. We check fit, availability and conflicts, then send a short, honest shortlist. You review CVs and speak with the expert before instructing. New to the process? See our guide on how to instruct an expert witness.
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Tell us about your forensic document examination matter
Describe the issues and the forum. We check fit, availability and conflicts, then come back with a short shortlist. Enquiries are confidential and create no obligation.
- Tell us the matterShare the issues, the sector and your timeline. No obligation, treated in confidence.
- We shortlistWe identify experts whose experience genuinely fits, and check availability and conflicts.
- You instructYou review CVs and speak directly with the expert before instructing on your terms.
What these disputes actually turn on
Football in particular generates a steady stream of document disputes: a player says he never signed an extension, a club says a page of the contract was replaced, or a governing body questions whether invoices or quotations are genuine. Where the parties' accounts conflict, the document itself becomes the evidence.
A forensic document examiner compares the disputed signature or document with genuine material, looks at how it was produced, and gives an opinion on a scale of probability. The quality of that opinion depends heavily on the material the examiner is given.
What the expert will examine
- Signatures and handwriting — the questioned signature against genuine specimens from the same period.
- Pages and sequence — signs that pages were substituted, added or re-printed, including indentations and staple holes.
- Printing, ink and paper — whether pages came from the same printer, pen and paper stock.
- Templates and patterns — in fraud cases, whether supposedly independent documents were produced from the same template.
Secure the originals early. Copies and scans hide pen pressure, ink and fine detail, so an examiner working from them can give only limited conclusions.
What the CAS awards show
Several awards on the CAS recent decisions page turn on whether a document is genuine. In CAS 2020/A/7032 (Malango v TP Mazembe) the sole arbitrator appointed an independent expert from the Zurich Forensic Science Institute to examine the signature and integrity of a contract. In CAS 2024/A/10777 (Pharco v Turay) each side called a handwriting expert. And in CAS 2024/A/10586 (Shohag v FIFA) a document examiner found that quotations in procurement processes had been produced from the same template.
A CAS panel can appoint its own expert, as the Malango case shows, so parties should expect their expert's work to be tested against an independent examination.
Choosing the expert
Look for an examiner with formal forensic training and casework experience, who reports conclusions on a stated scale and explains the limits of the material. For documents in other scripts or languages, check the examiner can work with them.
Key authorities and further reading
- Court of Arbitration for Sport: Code of Sports-related Arbitration — procedure, including expert evidence and panel-appointed experts
- FIFA: football regulatory documents — contract and transfer rules behind many document disputes
- CAS: recent decisions — the published awards cited on this page
FAQ
Common questions
What does a forensic document examination expert witness do?
They give independent, objective opinion to a court or tribunal on forensic document examination issues within sports, with an overriding duty to the court under CPR Part 35. The opinion usually takes the form of a written report and, where required, oral evidence.
When should I instruct a forensic document examination expert?
As soon as the issues are clear. Early instruction helps you test the strengths and weaknesses of the case, scope the evidence proportionately and avoid a rushed report against a deadline.
How do you select experts for forensic document examination matters?
On substance: relevant qualifications, genuine sports experience and an understanding of an expert's duties in litigation and arbitration. Where an expert has limited experience of giving evidence, we say so.
Can an examiner work from a scan or a photocopy?
Only to a limited extent. Copies hide pen pressure, ink and fine detail, so examiners qualify their opinions heavily. Ask for the originals as early as possible.
Need a forensic document examination expert?
Describe the matter and we'll identify specialists who fit.
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