Bindinglaw

WA · rules

Wash. R. Evid. 602

Lack of Personal Knowledge

activein force · 2006-09-01 – presentact-effective-date

A witness may not testify to a matter unless evidence is introduced sufficient to support a

finding that the witness has personal knowledge of the matter. Evidence to prove personal

knowledge may, but need not, consist of the witness' own testimony. This rule is subject to the

provisions of rule 703, relating to opinion testimony by expert witnesses.

History

[Amended effective September 1, 1992.] Comment 602 [Deleted effective September 1, 2006.]

Provenance

Source
www.courts.wa.gov
Retrieved
2026-09-16
Edition
2026-09-16
Content hash
0ce5c1762310ff2ecd71f6e2a8a6e56585575f62b78d0c7da72f2ad8caae93de
View the official source →

The link goes to the issuing authority’s own document — the one we read to produce this record. Where a source publishes whole titles rather than sections, your browser may need a moment to jump to the provision.

Unofficial copy of government-published law, reproduced from official sources with full provenance. Not an official publication; verify against official sources before relying on it in a filing. Records in the 'guidance' corpus, and only that corpus, are sub-regulatory (interpretive guidelines, survey procedures) and are not binding law. Validity bounds follow each jurisdiction's declared temporalBasis.

Coverage · API docs

Bindinglaw

Point-in-time US law with the receipt attached. Source URL, retrieval time, content hash, and validity dates on every answer.

curl api.binding.law/v1/law/coverage

© 2026 binding.law · a Jubal, Inc. productAttorneys and firms never pay. Ever.
Wash. R. Evid. 602 — Lack of Personal Knowledge · binding.law