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https://www.illinoislegalaid.org/legal-information/establishing-parentage-when-mother-agrees
Date: 10/25/2025

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  2. Family & Safety
  3. Paternity or parentage
  4. Establishing parentage when the mother agrees

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Family & Safety

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The Big Picture

Parentage is the legal relationship between a parent and a child. It includes both maternity (mom and child relationship) and paternity (dad and child relationship). When parentage is formed, it…

More on Parentage basics
Establishing parentage when the mother agrees How-To
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Sign the Voluntary Acknowledgement of Parentage (VAP)

Signing the VAP at the hospital

If the mother of a child is not married to the other would-be parent when the child is born, hospital staff will give her a Voluntary Acknowledgement of Parentage (VAP) form.  If both sign the VAP at the hospital, parentage will be established. The other parent's name will be added to the child's birth certificate A legal document with a person's place of birth, time of birth, and parents .

Signing the VAP later

If the mother and would-be parent do not sign the VAP before leaving the hospital, both can complete it later and mail it to the Department of Healthcare and Family Services. The parent's name will then be added to the child's birth certificate.

To fill out a VAP, use our Voluntary acknowledgement of parentage program. 

Parentage is now established

Parentage The relationship between a parent and a child is now established. This means that both parents must pay to support the child and can ask for parental responsibilities (custody) like decision-making power and parenting time Time that a child spends with a parent. Usually, the child lives mostly with one parent and has regular contact with the other (formerly called visitation). (visitation Time spent between a child and a person who is not the parent ). Learn more about Starting a case to get parental responsibilities or custody.

Last full review by a subject matter expert
January 23, 2025
Last revised by staff
January 27, 2025

About our legal information

Forms

Parentage and allocation petition for father Blank form
Use this form to ask a judge to establish parentage if you think you are the father of a child.
Voluntary acknowledgment of paternity - VAP Easy Form
A program to help you complete the forms to acknowledge that someone is the father of a child.
Parentage and allocation petition for mother Blank form
Use this form to ask a judge to establish parentage if you are the mother of a child.

Learn more

What is a paternity test?
Voluntary acknowledgment of parentage or VAP basics
My rights and responsibilities once parentage is established
Undoing a Voluntary Acknowledgement of Paternity (VAP)
I want a person's name removed or put on a birth record

Worried about doing this on your own?  You may be able to get free legal help.

Apply Online

The Big Picture

Parentage is the legal relationship between a parent and a child. It includes both maternity (mom and child relationship) and paternity (dad and child relationship). When parentage is formed, it…

More on Parentage basics

Forms

Parentage and allocation petition for father Blank form
Use this form to ask a judge to establish parentage if you think you are the father of a child.
Voluntary acknowledgment of paternity - VAP Easy Form
A program to help you complete the forms to acknowledge that someone is the father of a child.
Parentage and allocation petition for mother Blank form
Use this form to ask a judge to establish parentage if you are the mother of a child.

Learn more

What is a paternity test?
Voluntary acknowledgment of parentage or VAP basics
My rights and responsibilities once parentage is established
Undoing a Voluntary Acknowledgement of Paternity (VAP)
I want a person's name removed or put on a birth record
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© 2025 Illinois Legal Aid Online. 
All rights reserved.
 
ILAO is a registered 501(c)(3) nonprofit organization. ILAO's tax identification number is 20-2917133.