Nonconcurrency — the condition created by two or more policies covering the same loss exposure that do not have identical inception and expiration dates.

What is a Non concurrency endorsement?

Generally, the unimpaired aggregate endorsements means that the umbrella insurer will not pay for a claim, or defend a claim, if the situation underlying the claim happened while you had general liability insurance but before you purchased your umbrella policy.

What is primary and excess insurance?

Primary insurance is the policy that covers a financial liability for the policyholder as a result of a triggering event. Primary insurance kicks in first with its coverage even if there are other insurance policies. Excess insurance covers a claim after the primary insurance limit has been exhausted or used up.