LINCOLN, Neb. - In a dispute over whether a reinsurer owes $152,616.35 under a promissory note executed pursuant to a reinsurance participation agreement (RPA), the reinsurer filed a counterclaim on Feb. 2 in the Nebraska federal court, alleging that an insurer fraudulently charged employer-insureds inflated premiums and costs for workers' compensation insurance (Applied Underwriters Inc. v. Top's Personnel Inc., No. 15-90, D. Neb.).