If your "ex" wishes to file an action for visitation rights for his and your son, he wll be required to file a petition in the county court of your state and serve you with the summons and petition personally since there appears to be nothing already filed within the court system as to child support and visitation issues.Notice of any filed petition can take time assuming an actual petition is even filed. You might want to go down to the county court house where you and your "ex" live and look up under the court matrix information to see if any petition for child visitation has been filed by your "ex" concerning your son by looking up your name and the name of the "ex".If the names do not show up in the court matrix, most likely no petition has been filed.Good luck.