Arizona Paternity — Response is a legal process used to determine the legal father of a child. It is used to establish the rights and responsibilities of a father for a child, including financial support and parental rights. This process can be used when a child is born to unmarried parents or when a father wants to be named on a birth certificate. There are two types of Arizona Paternity — Response: Genetic Testing and Voluntary Acknowledgment. Genetic Testing is a process where a DNA sample is taken from the father and the child and analyzed. If the results show a high degree of probability that the man is the father, then he is legally declared as the father. Voluntary Acknowledgment is a process whereby the father signs a form that states he is the father, and the form is filed with the court. This is the most common way of establishing paternity in Arizona.