Instructions for Voluntary Acknowledgment of Paternity

What is voluntary Acknowledgment of Paternity (AOP)?

According to New York State law, a child born to unmarried parents has no legal father. The voluntary Acknowledgment of Paternity (AOP) is a legal process through which paternity, or legal fatherhood, can be established.


Basic steps to complete an AOP form (LDSS-4418)

The LDSS-4418 form can be completed in five basic steps, listed below. Each step is accompanied by one or more illustrations. Use the buttons on the right to display or hide all the illustrations. To see individual images (in a separate window), click on the links in the text.

  1. Complete the child's section of the form. Enter the child's full name, the name and address of the hospital, the child's date of birth, and the child's sex.
    Child's information
  2. Complete the father's section of the form. The father must provide his full name, address, place of birth, date of birth, and Social Security number. Have the father sign the form in front of two witnesses.
    Father's information
  3. Complete the mother's section of the form. The mother must provide her full name, address, place of birth, date of birth, Social Security number, and maiden name. Have the mother sign the form in front of two witnesses.
    Mother's information
  4. Complete the "official" sections of the form:
    1. the Hospital Code, place where the form is being signed, and the Recorded District and Register numbers at the top of the form. Note: Only the Birth Registrar can enter the district and register numbers.
      Hospital Code, district and register numbers
    2. the Registrar's signature and date at the bottom of the form.
      Birth registrar's signature
  5. Have both parents fill in their mailing addresses on the back of the form.
    Parents' addresses on back of form

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Training manual

The training manual includes step-by-step instructions to help unmarried parents complete the LDSS-4418, New York State's voluntary Acknowledgment of Paternity (AOP) form. If you wish, you can view a PDF of the training manual.