The Indiana Paternity Affidavit (Form 44780) is the form two parents complete together to name a child’s father. Below you will find when parents use this document, what to check before signing, and how to fill out each section.
Last Updated: October 2026. This guide is reviewed and updated regularly to reflect current law. If you notice an error or outdated information, please contact us.
Paternity (or parental) affidavit is a legal document that is created by both parents and serves as proof of the legal paternity of the named parent. This form automatically recognizes the person as the father of the child. Further court orders are no longer needed.
If a child was born during the marriage of two people or no later than 300 days after the marriage ended, then everything is simple. The man is automatically recognized as the father of the child.
But what if the parents are not married or are not in a long-term relationship? In this case, there are several ways:
Registering paternity by an order from the court is a longer and more complex route. DNA testing is often used for this.
There are two methods to fill out this document — easy and more difficult. The easiest way is to complete the paper in the hospital within 72 hours of the baby’s birth.
The more difficult way is to fill out the document at the local health department. But this can be done up to the child’s 19th birthday if the column on paternity in the birth certificate is empty (and unless otherwise is ordered by a court).
The first way is better not only because you do not need to go anywhere, but also because:
After completing and signing the paternity affidavit form, a man can revoke his decision only within 60 days from the date this paper was submitted. After this period, he cannot cancel paternity, even if DNA tests show that he is not the genetic father of the child.
If, within 60 days, the father decides to revoke the document, then he needs to apply to a court with jurisdiction over paternity with filed action. Moreover, the mother of the child does not have the right to cancel the validity of the document.
It cannot be said with confidence that children from full families with both parents are happier. This is a very individual moment. But definitely, everyone needs to know their parents and has a right to this. It helps to know yourself and find a sense of belonging.
A father’s presence matters in a child’s life. It can make childhood more complete and support the child’s emotional health. Identity, recognition and a sense of belonging matter too. Even if the father and the child do not stay in touch later, the child still gains from knowing who the father is.
Besides, having both parents provides some financial protection and legal benefits. What are the legal and financial benefits of paternity? There are quite a few of them:
Initial legal recognition will give the right background to the paternal relationship with the child. Every parent has the right to healthy communication with their children and to take care of them.
Read these points before you sign the Indiana Paternity Affidavit. Indiana laws regarding obtaining a birth certificate and completing a paternity affidavit are set out in Indiana Code § 16-37-2-2. According to it, this document is valid only if:
The document must be signed by both parents without coercion. A crucial point, spelled out in the text of the form — parents should be able to consult a chosen adult about signing the document and should be able to think over and read the document alone without the presence of the second parent. This point is especially important for parents under the age of 18.
The document is almost impossible to reverse, so it is important to take it seriously and get legal advice if necessary.
The form of the document is strictly agreed with Indiana law and does not allow free-form writing.
While filling out the document at the hospital will make it easier for you to acknowledge paternity, you should not rush if you are unsure. Remember that you are not required to sign anything, and you should not do this if you are not sure that you are the biological father of the child. Signing this paper can be an irreversible process.
So if you need additional evidence, you have the right to request a genetic test. If you want an inexpensive test, we recommend you contact your local Prosecutor’s Office for more information.
Not only fathers but also mothers should be careful with this document. It is important to know that intentionally or knowingly falsely naming a father is considered a Class A misdemeanor.
Open the form in our online PDF editor and fill it in by following these 12 steps in order. Check each entry against the screenshot before you move on to the next step.
Enter the Tracking Details
At the top of the first page, enter the numbers used to track the form:

Put Your Signatures
Parents must sign their names before completing the form. By signing at the beginning of the paper, you confirm that you had the opportunity to study the document on your own and resort to the advice of an adult of your choice. Please take this point seriously. The document can be challenged if this condition was not met or if it turns out that the document was signed under duress.

Fill in the Names of the Parents
You must specify the full legal names of both parents.

Fill in the Father’s Acknowledgment
Next, the child’s father completes his acknowledgment by entering:

Complete the Mother’s Acknowledgment
The mother of the child completes her acknowledgment by entering:

By completing this section, the father and mother of the child acknowledge the biological paternity of the specified man. The mother expresses her desire for the indication of this man in the birth certificate of the child.
Fill in the Father’s Details
Section B asks for more details about the biological father of the child, including:

Fill in the Mother’s Details
Fill in Section C the same way as the previous section, using the details of the biological mother.

Decide on the Child’s Name
Parents must submit a joint decision on the child’s name and write it in the appropriate box.

In the same section, also enter:

Transfer the Data from the Document’s Beginning
Move to the second page. At the very top, enter these four items again:

Study the Information
In section E, you will find important information about the validity of the document, your rights, and obligations. It is very important to study and understand it thoroughly. If you need help and advice, be sure to ask for it. This is your inviolable right.
Remember that you are not required to sign a document under duress. If everything is clear and you have no questions, then put your signatures in the appropriate lines. The document requires the signature of both the mother and the father. Also, each parent must put the date of filling out the document.

Make Your Decision on Joint Custody
You can decide to share joint legal custody. In this case, the signatures of both parents must be in points 1, 2, 3 of Section F. Thus, you:
It is essential to note that if a DNA test is not provided within 60 days or it shows that the specified man is not the biological father of the child, then joint legal custody will not apply. But even so, paternity will still be valid, as stated in the paper.

If you do not want to share this custody, then at least one of you must sign in point 4 and put the initials of both in point 5.

Despite this, the paternity adopted in the document will still be valid. But legal custody will pass to the mother.
To Be Signed by a Notary
Further points of the paper are filled in by a notary. Also, a Notary must sign it to certify the document.

Have the full legal names of both parents, the child’s name, date and place of birth, and each parent’s address and contact number ready. The form also has spaces for Social Security numbers, the father’s employer and any medical insurance details.
Section B holds the father’s details and Section C holds the mother’s details. The father and the mother each complete their own acknowledgment near the top of the first page.
Compare every name, date and number with your IDs and the child’s records. Read the information in Section E and ask about anything that is unclear before you sign.
General information, not legal or tax advice.
