Generally speaking, you will need to establish a merchant account with the credit agency(s). As you may find that alternative more trouble than it is worth, here is a simpler alternative:
Only speaking as to CA (but likely in most other states), if you obtain an "abstract of judgment" from the court (for a fee) and record that abstract of judgment at one or more County Recorders (for a fee), the credit agencies will pick that judgment up and report it on the tenant's credit report. Generally, you cannot record abstracts out-of-state unless first obtaining a "sister state judgment", but abstracts work reasonably well in-state. Furthermore, the recorded abstract is good for ten years, and can be renewed. The abstract also serves as a cloud on title which will prevent the tenant from selling or purchasing property (in-state), unless your judgment is satisfied. In CA, the judgment acrues interest at 10% per annum, but that is only helpful so long as you are actually able to collect. Strategically, if you have reason to think the tenant is likely to purchase real property in the reasonable future (it happens), if you wait until after the tenant has purchased the real property to record the abstract, your judgment now becomes a lien against that property. Of course, if you wait to record the abstract, then the abstract won't show on the tenant's credit reports.
Do not forget that your judgment (at least in CA) has a shelf life of 10 years. Renew the judgment, plus your accrued interest, plus your "legal costs", before the ten year mark, or the judgment becomes void (along with the abstract). (At 10% post-judgment interest, the judgment doubles every ten years.)
Research your state for these remedies. Good luck. If you have additional questions, feel free to pm.
