Mass. Gen. Laws ch. 234A, § 43

The office of jury commissioner may send a delinquency notice by certified or first-class mail or by delivery by a sheriff or constable to any grand or trial juror who has failed to appear for juror service based upon the records in the office of jury commissioner; provided, however, that the purpose of the delinquency notice shall be only to notify the juror of his delinquency status and to rectify the problem by appropriate means. The office of jury commissioner shall have discretionary authority to resolve problems with delinquent jurors or with jurors appearing to be delinquent in accordance with guidelines approved by the committee.