Unless otherwise provided in this Act, if the mother was married at the time of conception or birth and the presumed father (that is, the mother's husband) is not the biological father of the child, the name of the biological father shall be entered on the child's birth certificate only if, in accordance with subsection (5), (i) the mother and the person to be named as the father have signed a voluntary acknowledgment of paternity form and (ii) the mother and presumed father have signed a denial of parentage form .
The Department of Healthcare and Family Services shall furnish the voluntary acknowledgment of paternity and denial of parentage forms to institutions, county clerks, and State and local registrars' offices. The forms shall include instructions to send the original signed and witnessed voluntary acknowledgment of paternity and denial of parentage to the Department of Healthcare and Family Services. The voluntary acknowledgement of paternity and denial of parentage forms shall also include a statement informing the mother, the alleged father, and the presumed father, if any, that they have the right to request deoxyribonucleic acid (DNA) tests regarding the issue of the child's paternity and that by signing the form, they expressly waive such tests. The voluntary acknowledgment of paternity and denial of parentage forms shall contain the data elements required by federal law.
410 ILCS 535/12