TMZ.COMPrince just filed the most awesome lawsuit against a collection agency — ’cause, for a change, he’s going after them to get back more than $100,000 the agency allegedly jacked from his bank account.

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According to the suit … Capital Asset Protection made two withdrawls from Prince’s bank accounts back in June in the amount of $105,949.14 and $10,278.94.

CAP was collecting the money for a lawsuit Prince previously lost over a music production contract. But in the new documents, filed Thursday in L.A. County Superior Court, Prince says a judge vacated that original judgement in October, 2011 … thereby erasing his debt to the production company. So, according to the suit, CAP collected on a debt that didn’t exist. Oops.

Prince is suing to get back his $116,228.12 … plus interest. Baby, he’s a star.