Prince might be dead, but that doesn't mean he's off the hook with a divorce lawyer who claims the singer signed off without paying his $600k tab.
Cousins Law Firm in West Palm Beach filed a claim with the singer's estate demanding payment of a $599,735.63 bill.
Patrick Cousins tells TMZ the bill dates all the way back to Prince's 2006 divorce from second wife Manuela Testolini.
Cousins says he and Prince were tight and had an agreement the singer didn't have to pay until all the loose ends were tied up. We asked the lawyer what would take 10 years to complete, but he wouldn't say.
Cousins claims he finished everything on April 1 ... Prince died April 21.