A collection agency has gone to federal court claiming Miami’s Jackson Memorial Hospital shortchanged the company to the tune of $878 million by selling it a portfolio of uncollectible debts.

International Portfolio Inc. of West Conshohocken, Pa., sued last week in U.S. District Court in Miami and named the hospital and Miami-Dade County, which operates the facility, as defendants. IPI alleges bad-faith dealings involving deceased debtors and sloppy accounting.