Mass. Gen. Laws ch. 54 § 121
The county commissioners to whom the copies of the records of votes for county treasurer and register of deeds have been transmitted shall, on the first Wednesday of the month following the election, examine such copies, determine what persons appear to be elected, issue certificates of election to them and give notice to the state secretary of the name, residence, and number of votes received by each candidate in each city and town, with the name and term of office of every person elected.
In Suffolk county, the election commissioners of Boston shall, within ten days after the election of register of deeds, in like manner examine the copies of the records of votes, determine who appears to be elected, issue a certificate and give notice as above provided.
Mass. Gen. Laws ch. 54, § 121