Many children in Arizona are born to parents who are not married. Despite this, many times the father is present and known to both the mother and child. However, this by itself does not establish paternity. There are a few legal steps that must occur before the establishment of paternity. Many times these steps are done voluntarily and there is not a dispute, but this is not always the case.
Even if the parties are ordered to obtain a paternity test, which concludes that the man is presumed to be the father, either parent can still challenge the finding. The party opposing the results must submit a written challenge to the genetic test results within 20 days of the results being submitted to the court. If a written challenge is not submitted, then the test results automatically become evidence in the case.