Mass. Gen. Laws ch. 30A § 13A
Agencies and political subdivisions of the commonwealth, that issue a license under section 13 shall require an applicant for issuance or renewal of such license to provide a social security number as a condition of issuing or renewing such license and shall record such social security number in the applicant's record; provided, however, that the applicant may, on the face of the license, use a number other than his social security number as permitted under any other provision of law of the commonwealth; provided further, that the agency issuing the license shall provide information in its records, including the social security number of applicants, to the IV-D agency as set forth in chapter 119A, using the method and format required by said IV-D agency.
Mass. Gen. Laws ch. 30A, § 13A