Acknowledgement of Paternity in Washington State
What is an Acknowledgement of Paternity form?

What is an “acknowledgement of paternity” form?
In Washington State, state law provides that, “upon the birth
of a child to an unmarried woman, the attending physician, midwife, or his or
her agent shall…provide an opportunity for the child’s mother and natural
father to complete an acknowledgement of paternity.” This is a specific form (sometimes called a “paternity
affidavit”) prescribed by the state registrar of vital statistics that must be
signed by both the mother and the father under penalty of perjury. If this document has been executed, then a
certificate of birth will be issued including the father’s name and date of
birth. If no alleged father is named on
a birth certificate of a child born to an unwed mother, then the phrase “None
Named” will be placed on the birth certificate in the father’s category. What is the significance of an affidavit of
paternity? A valid acknowledgment of
paternity filed with the state registrar of vital statistics is equivalent to
an adjudication of parentage of a child and confers upon the acknowledged
father all of the rights and duties of a parent. What happens if an unwed mother or father does
not sign an acknowledgement of paternity?
Paternity can be established by a court case (a “paternity” case, also
known as a “parentage” case) brought by either the mother or the father. Such a case may or may not require genetic testing.
If you would like to discuss a paternity / parentage case or other family law matter, please contact our office.









