Montana Title 42. Adoption § 42-2-402. Voluntary relinquishment--validity

(1) A voluntary relinquishment is not valid unless the parent specifically relinquishes custody of the child to the department, a licensed child-placing agency, or a specifically identified prospective adoptive parent and:

(2) A voluntary relinquishment of a parent's rights solely to the child's other parent does not relieve the parent executing the relinquishment of any duty owed to the child or for the child's support.