Is Child support payment still being made to the state

I have reason to believe that my ex-wife has lost her job and that her father is paying her child support to the state by personal check to avoid me knowing that she is unemployed. It would greatly affect her visitation rights with our son if she has lost her job. I access the TN Child Support website to see that a payment has been made but it does not show whether it was made by garnishment or personal check. Thanks!