Massachusetts General Laws Part IV. Crimes, Punishments and Proceedings in Criminal Cases (Ch. 263-280) Ch. 276, § 32

Whenever a person, brought before a court, against whom an outstanding warrant was issued, solely due to the failure of the person brought before the court to pay a fine  1 assessment, court cost, restitution, support payment, or other amount, the court may accept payment of such amount and assess an additional fifty dollars which assessment may be waived by the court upon a finding of good cause and if the person is not being held on other process, the court may direct that the person be released from custody and shall notify the jurisdiction in which the warrant was issued of the payment and the assessment, if any. Upon notice of the release the court that issued the warrant shall recall the warrant and cause such information to be entered in the warrant management system.