An unsubstantiated claim is a public statement that asserts something checkable and has no evidence recorded against it, whether or not the statement happens to be true.

This is one entry in The Knowledge Company claim register: a statement the company publishes, the source it was checked against, the date of the last check and the date that check expires. When the stale-after date passes, the status degrades on its own until a person re-verifies the claim. Nothing is marked verified automatically.