The ability to do this depends on the state and possibly county in which the proceedings took place. The best place to start is to contact the local officials overseeing the payment. In any case ALWAYS track payments on your own.
This really depends on the State or City agency. For example, in Florida you can look up your last 5 payments. I suspect that many other states have the same provisions as well. You should be able to review your payments if you provide your social security number and your case number.
If your child support payments are made to the division of child support you will be able to view your payments on line. The division of child support list a record of current and past support payments. If you pay child support directly to your childs other parent you will not be able to view payments online.
Yes you can view child support payments online. If you have used your debit card then check with your bank for a statement. If you pay through a child support office just set up an online account with them and you can check it there.