contra-indicator

The definition, in our words

Evidence that calls into question whether an age assurance attribute is correct.

Why the distinction matters

Contra-indicators can sit with the person, such as conflicting records, or with the system, such as a presentation attack. The framework expects a system to look for them even when it is examining an authoritative document.

How to use it in a comparison

List the contra-indicators the system checks, the ones it ignores and the action it takes on each. A comparison that only tests the happy path misses the cases a fraud team sees first.

Where it changes the evidence

A definition is not decoration. It decides which test is meaningful and which result can be compared. Where a supplier's material uses the term differently, the comparison should quote the supplier's use and place it beside this one. A difference in definition is a finding about comparability, and it belongs in the report rather than in a footnote.

The analysis units on this site use the term as the framework defines it. Where a unit turns the term into a question, the question is written on the unit page and the evidence artefact is named. The kit repeats both, so a row in the register and a paragraph in the report use the same meaning.