An evidence concept defining admissibility, foundation, or protected communications in civil adjudication. It governs what information may be presented and how reliability, prejudice, and confidentiality concerns are addressed. It does not permit admission without required foundation and does not defeat valid protections when their elements are satisfied. It materially affects fact-finding by shaping the record available to the decisionmaker and the costs of litigation. The concept is generally stable, though rule amendments and interpretive developments may refine application over time.

Principle

Evidence must be shown to have a reliable origin and identity before a tribunal will accept it as the item it purports to be; authentication secures that link through testimony, documentation, or distinctive characteristics.

Demonstration

A party seeking to admit a signed contract calls the custodian who witnessed its execution and presents the original with matching witness testimony and metadata from an electronic signature system to establish provenance.

Misapplication

Attempting to admit a copied photograph as the original without offering testimony about how and when the copy was made, thereby failing to establish the necessary chain of custody or provenance.

Consequence

When properly authenticated, the item becomes admissible and the factfinder may assess its evidentiary weight; without authentication it will often be excluded or admitted only for limited non-substantive purposes.

Reversal

Assuming authenticity without supporting foundation — for example, treating a document as genuine simply because it is physically present in the case file — flips the protective function of authentication into a source of error and potential prejudice.

Boundary

Covers identity and origin but does not by itself establish substantive truth or reliability; authentication is distinct from relevance, hearsay exceptions, and expert validation, though it may intersect with them.

Semantic Tension

Authenticity (is this the thing it claims to be) versus reliability (can the contents be trusted); authentication secures identity while reliability addresses correctness and probative value.

Synthesis

Authentication is the foundational gatekeeping act that links an item to its source and context so the tribunal can lawfully receive it and then evaluate its probative force.