They do have no leg to stand on. Again what is the name of the collections company? You have to be careful with some of collections companies some companies are big scam artists . Some will go to send you fake court docs. I would call if you haven't already the court house and make sure that those docs are real if they are from a county court house or local? If the court doc are from thier office only they might fake. The law states you must be suied in the state you are from. That's according to the FDCPA. Please don't sign anything you send to them just send letters requesting information still. Don't agree to pay them anything.
If thier is an attorney name make sure that the attorney is registered . A lot of these collectors pretend to have attorneys working for them when they are not.
This is how they bully you to pay your bill when they have no leg to stand on and don't veryify the bill.
JUST LOOKING OUT FOR YA