Section 6: Presumption of paternity; mandatory joinder
Section 6. (a) In all actions under this chapter a man is presumed to be the father of a child and must be joined as a party if:
(1) he is or has been married to the mother and the child was born during the marriage, or within three hundred days after the marriage was terminated by death, annulment or divorce; or
(2) before the child's birth, he married or attempted to marry the mother by a marriage solemnized in apparent compliance with law, although the attempted marriage is or could be declared invalid, and the child was born during the attempted marriage or within three hundred days after its termination; or
(3) after the child's birth, he married or attempted to marry the mother by a marriage solemnized in apparent compliance with law, although the attempted marriage is or could be declared invalid, and
(i) he agreed to support the child under a written voluntary promise, or
(ii) he has engaged in any other conduct which can be construed as an acknowledgment of paternity; or
(4) while the child is under the age of majority, he, jointly with the mother, received the child into their home and openly held out the child as their child; or
(5) he has acknowledged paternity in a parental responsibility claim as provided in section four A of chapter two hundred and ten and the mother, having received actual notice thereof, has failed within a reasonable time, to object thereto; or
(6) with respect to a child born before April 13, 1994, with his consent and the consent of the child's mother, he is named as the child's father on the birth certificate as provided in section one of chapter forty-six.
(b) Notwithstanding the provisions of subsection (a), a husband or former husband shall not be required to be joined as a party if non-paternity of the child has previously been adjudicated in a proceeding between the husband and the mother of such child in a court or administrative agency of competent jurisdiction.
(c) Notice to a party joined as herein provided shall be sufficient if the summons is mailed to the last known address by a form of mail requiring a receipt and, if actual notice shall not be made as aforesaid, by publishing a copy of the notice once in each of three successive weeks in a newspaper designated by the court.