in my opinion no. unless it is stated in the divorce papers or he says you can, then its harrassement, if he tells you know.
Only if the child is still under 18.
Anyone can, but can't be required to.
Yes, if a current case exist. If not, than no.
Sadly, yes. That doesn't mean it's right, though.
You may ask the court to award a judgment for interest.
You can attach the estates of him and his parents
The courts will mostly likely consider a child who enters the military as "emancipated," and, therefore, terminate child support. But don't stop paying on your own!
Not on SSI. If she is on SSD, than there is a separate child benefit check. However, it should be stated that the child does not have the legal right to move, and if a child support order is in place, it must still be paid until the court rules otherwise. see link below
If he's paying child support for the child.
Your Social Security eligibility is not affected by your receipt of child support. One is for you; the other is for your child.
only if his attorney had agreed to represent you, also
No