Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 51, § 47

If, after examination of an affidavit of registration, it appears to the registrars from the facts set forth in the affidavit that the person is not qualified to be registered as a voter or that the affidavit is incomplete, they may decline to enter his name on the annual register. The registrars shall notify any person whose name is not so entered and give him a reasonable opportunity to remedy the defects in his affidavit. If the registrars are still not satisfied that the affidavit meets the requirements of this chapter, they shall not accept it and shall forthwith inform the person thereof.