Webinformation, forms, and resources for establishing or challenging paternity in an arizona superior court. This may be done through court action or. Establishing paternity means to establish a legal father for a child. I am a resident of maricopa county in the state of arizona. I am the legal father of a child by default and not the biological father. There was never a blood test. However, if the issue. You may use the forms on this page if the following factors apply to your. Webthe first thing to do is to complete the court forms to establish child custody. If paternity is in question, it must be established before an application for. Webthis packet contains court forms and instructions to file to establish paternity for an adult child. Items in bold are forms that you will need to file with the court.