Prince is being sued for over $700,000 (£430,000) by a New York law firm.
Patterson Belknap Webb & Tyler says the singer has failed to pay them adequately for helping him settle cases in Ireland, California and New York.
According to Billboard, the firm also alleges Prince has failed to settle his legal bill from his divorce from second wife Manuela Testolini in 2007.
Patterson Belknap Webb & Tyler confirmed that the singer had paid them $125,000 (£77,000), but say he owes them a further $700,000 (£430,000).
Prince finished a nine-date US arena tour on February 24 at California‘s Oakland Oracle Arena.
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