Noun
IBNR (uncountable)
(insurance) Initialism of incurred but not reported, referring to insurance claims for events that have occurred, but for which the insured party has not yet notified the insurer.
On COVID-19 claims, for example, “the reinsurance sector has been proactive” in its reserving, with 70% to 80% of recent reserves posted for incurred but not reported (IBNR) claims, Karakuyu said. Source: Internet