- Illegitimate children may not inherit property from their father (except through a Last Will & Testament, voluntary acknowledgment of paternity, or an adjudication of paternity);
- Illegitimate children are not eligible for survivor's Social Security Benefits as a result of the death of the child's father (42 U.S.C. § 416(h)(2)(A); M.G.L. c. 190 § 5);
- Illegitimate children may sue for wrongful death of their deceased father (Levy v. Louisiana, 391 U.S. 68 (1968));
- In Massachusetts, the father of an illegitimate child may NOT have his parental rights terminated for the father's failure to legitimate the child (M.G.L. c. 119 § 26(4)) M.G.L. c. 210 § 3);
- The father of an illegitimate child does not have the same notice rights in an adoption proceeding involving the illegitimate child, unless the father has been adjudicated to be the father, but even if he has not been so adjudicated he may still file a parental responsibility claim to obtain the same notice rights (M.G.L. c. 210 § 4A);
- The birth certificate of a child who is legitimated will be changed to show the father's name (M.G.L. c. 46 § 13);
- Procedures for the establishment of child support are abbreviated. If a child is born out of wedlock, child support is established in paternity proceedings. If a child is born to married parents, child support is established during divorce proceedings.
Additionally, in Massachusetts there is a difference in the treatment of child support between "illegitimate" children and children born of a marriage. For "illegitimate" children, child support may be sought from the time of the child's birth. For children born of a marriage, child support may only be sought in a divorce dating back to the date of filing or date or service of the complaint for divorce.