This Insurance Glossary of Terms is produced and maintained by the National Alliance Research Academy. 
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Represents the liability for unpaid claims not reflected in the case reserve estimates for individual losses. The two components to IBNR reserves are pure IBNR and broad or bulk IBNR; pure IBNR are those claims that have occurred but have not yet been reported as of the evaluation date; and, broad or bulk IBNR is the additional development on known claims or the increase in reserve value as the claim are investigated and settled.

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