The parents can agree to waive the unpaid support - the court must approve this after finding it to be in the child's best interest.
No. Child support arrears are owed to the parent.
It seems unlikely that a non-custodial relative would have "standing" to request a change in child support.
If the custodial parent agreed to deviate from the original child support amount, she can increase it back to the original amount if there is a court order. In additional, the non-custodial parent may have to pay back child support for the time when he paid less.
no
No. The back child support is owed to the custodial parent and the amount due doesn't go away until it has been paid.
It depends on the state you live in. Some states allow the custodial parent to opt out of child support. Other states don't give you that option, and will collect the child support even if the custodial parent refuses to accept it.
only with the court's permission
Child support does not belong to the child but rather to the custodial parent to help compensate for the cost of raising the child until he or she is 18 or no longer attends school as a fulltime student. The custodial parent can however seek payment for back past child support from the non custodial parent.
Most states do not allow a child to collect back support as an adult. Although the right to child support belongs to the child, support is payable to the custodial parent to assist in the care and upbringing of that child. If the custodial parent did not receive that support, then she (or he) made contributions that should have come from the other parent, and the right to collect the back support belongs to her.
Yes, back child support is paid until paid in full, regardless the age of the children. There is NO statute of limitation when it comes to child support.
Either to the custodial parent as the obligee, or to the State as reimbursement for public assistance.
Not even if he wasn't in arrears.