If you are facing a suspension, anti-doping violation, or disciplinary appeal at the Court of Arbitration for Sport (CAS), your testimony as a party can directly impact the outcome of your case. Understanding how CAS evaluates party testimony can protect your credibility—and your career.
CAS is not a typical courtroom. It is an international arbitral tribunal. The panel may include arbitrators from different legal backgrounds, and the way evidence is handled is different from what many athletes expect.
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Written Statements Are the Foundation of Your Testimony
In most CAS cases, witnesses submit detailed written statements before the hearing. Those statements usually serve as their direct testimony.
That means:
- Your written statement must be complete and accurate.
- You will be questioned based on what is already in writing.
- Inconsistencies between your statement and your oral answers can damage credibility.
Unlike courts where testimony develops live, CAS panels expect the story to be laid out in advance. Hearing time is typically reserved for questioning and clarification.
Because CAS draws from both civil law and common law traditions, written evidence often carries significant weight, especially when supported by documents.
Documents Often Matter More Than Demeanor
CAS arbitration panels are trained to evaluate credibility based on the totality of the evidence—including documents, consistency, and plausibility—not just how someone appears on the stand.
CAS panels focus on:
- Whether your testimony aligns with emails, texts, medical records, lab reports, or supplement receipts
- Whether your explanation has remained consistent over time
- Whether other witnesses corroborate your account
In anti-doping cases especially, objective evidence can outweigh personal recollection.
CAS Understands the Limitations of Memory
Many CAS cases arise months or even years after the events in question. You may be asked to recall conversations, supplement use, medical advice, or meetings that happened long ago.
Scientific research tells us that human memory can be influenced by repeated retelling, later conversations, and even the wording of questions. Testimony must be carefully prepared and supported wherever possible by contemporaneous documents.
CAS panels look for:
- Consistency with documents
- A logical and credible explanation
Saying "I don’t remember” when you genuinely do not remember is better than guessing.
Cross-Examination Is a Stress Test
Cross-examination at CAS reflects international arbitration practice. It is usually focused and strategic.
Effective testimony under cross-examination requires:
- Listening carefully
- Answering only the question asked
- Avoiding speculation
- Staying calm and measured
Overexplaining or trying to “win” exchanges can lead to a bad outcome.
The Panel Can Question You Directly
CAS arbitrators ask their own questions. This reflects the hybrid nature of international arbitration, where panels take a more active role in clarifying facts.
You must be prepared to answer to the panel directly:
- Timeline questions
- Questions about documents
- Questions testing the logic of your explanation
- Questions about the precautions you took
Anti-Doping Cases: Your Testimony Can Shift the Outcome
In many anti-doping cases, once a violation is established, the burden shifts to the athlete to prove No Fault or No Significant Fault in order to reduce a sanction. Your testimony becomes central.
Panels will evaluate:
- How the substance entered your system
- Whether you exercised due diligence
- Whether your explanation has remained consistent from the beginning
- Whether other evidence supports your account
Small inconsistencies can become significant if they affect the panel’s confidence in your narrative. This is why early preservation of receipts, labels, medical advice, and other forms of evidence is critical.
How We Prepare Athletes for CAS
Preparation is not about scripting. It is about clarity, consistency, and accurate presentation of the facts. Effective witness preparation includes:
- Reviewing all relevant documents carefully
- Identifying potential vulnerabilities in advance
- Ensuring your written statement reflects your authentic voice
- Practicing concise and accurate responses
- Preparing you for the types of questions panels typically ask
At Global Sports Advocates, we have represented athletes in some of the most high-profile CAS proceedings in the world. We understand how panels evaluate testimony across different legal traditions and how to present your case in a way that is credible, consistent, and persuasive. If you are facing a CAS appeal, anti-doping charge, or disciplinary proceeding, we urge you to contact us to discuss your next steps.
