My suggestion: Get a court order terminating support as of a specific date, with a finding as to the amount of arrearage, or that there is no arrearage. Then send certified copies to the child support agencies in your State and the State where the child lives and/or where any other orders were entered in the matter.
If the other parent is willing, this can be achieved, pro se, through the use of a certified mediator.
Yes, but a modification needs to be filed. see links
A motion needs to be made to the courts for approval.
A modification needs to be filed. see links below
In Missouri, after 30 days the support can stop, but in most states, a modification motion needs to be filed with the courts.
Child support is paid to meet the needs of a child. If the child needs a cell phone, yes.
Receipt of Social Security (versus SSI) does not relieve one of a support obligation. However, the child's allotment, if any, counts as support just as if you had paid it yourself. But a motion to modify needs to be filed. see links below
If it involves a move, an injunction needs to be filed.
Child support is used to take care of a child's needs. A parent can choose to give you the money but as long as all needs are met, they do not have to.
It depends on where you live. In the United States, the parent who filed for child support can file for modification or termination of child support, but needs to provide supporting documentation as well as good reasons why it should be modified/terminated. The court looks at the well being of the child and what would be best for him/her, not whether a parent has a change of heart and is doing this to cut the other parent some slack.
if the child is special needs and has to live with a parent yes otherwise no
The defendant must petition the court in person. To do this, certain paperwork must be filed and then a court date will be set. You must show proof positive that you have met all your financial obligations for child support. If one has missed any payments during the time they were making child support payments, those are STILL owed and the court will not rule otherwise until the entire debt has been satisfied.