Massachusetts General Laws Part III. Courts, Judicial Officers and Proceedings in Civil Cases (Ch. 211-262) Ch. 236, § 28

The officer, thirty days at least before the sale, shall deliver to the debtor, if found within his precinct, a written notice of the time and place of sale and shall post such a notice in a public place in the town where the land lies and also in two adjoining towns, if there are so many in the county. The officer shall also publish such a notice once in each of three successive weeks, the first publication to be not less than twenty-one days before the day of sale, in a newspaper published in the town where the land lies.