Some countries have reciprocal agreements with the US to collect child support. I suggest that you contact your State's child support agency. When you get an interview with them, bring all the papers relating to your child support: birth certificates, acknowledgments of paternity, court orders, payment records, etc. Be polite but persistent. Good luck!
All you need to do is, petition the court to modify your child support order.
Although a father has a moral obligation to support his child he is not legally responsible for payment until there has been a support order issued by the court.
Yes. If paternity has been established the father will be required to pay child support until the child is at least eighteen.
Child support can be terminated only if/when the child is adopted.
No, it will have no effect.
That depends on the child support laws of your state and how long you have been the legal or presumed father. In most states if you have been the legal father for at least four years it does not matter if you are not the child's biological father. You will still be held to be the child's legal father and required to pay child support unless you can locate the child's biological father. You have to actually file a petition in court to end your responsibility for child support and you really will need a family law attorney to assist you. The attached link has a family law attorney directory. In most States you can file a Petition to Disestablish Paternity. You generally must be current on your child support payments to do so. With the DNA evidence you can get the child support abated if you are not the Father.
Child support is calculated based on income of the father (or mother in such a case). If the father is unemployed his child support will still be calculated based on whatever minimum wage is in your state. The only time this does not apply is when the father is on disability. Welfare shouldn't matter.
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Child support and visitation rights are two separate issues and they are addressed separately. The father's paternity must be legally established in court if the parents are unmarried and the mother seeks child support. Once paternity has been established, the court will issue a child support order based on state child support guidelines. In addition, once paternity has been established the father has the right to petition for a visitation schedule. If the father fails to pay his child support he is still entitled to visitations. In that case, the mother would need to pursue the child support arrears by filing a motion for contempt of the child support order.
Arizona Child Support Enforcement will handle it.
Sue him for retroactive child support.
No, in order for a lawsuit for child support arrearages to be valid the support order needs to have been in affect before the child reached the age of majority.