A New York City law firm has said Prince owes more than 700,000 dollars (£430,000) in legal fees for services that included helping to settle financial obligations to his former wife.
The firm is suing the Purple Rain singer in state Supreme Court in Manhattan.
Patterson Belknap Webb&Tyler says in a lawsuit filed on Tuesday the musician failed to pay it for handling cases in Ireland, California and New York. The law firm also says it was not paid for representing him in his divorce. It says he has paid 125,000 dollars (£77,000).
The 52-year-old singer is best known for 1980s hits such as When Doves Cry and 1999.