Advanced – Non-Functional Testing
Non-Repudiation – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
The degree to which actions or events can be proven to have taken place, so they cannot be repudiated later.
In simple words
You can prove who did what, so they can't deny it later.
Exam tip
Audit logs and digital signatures support non-repudiation.
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