Food for thought. If that debt wasn’t on your credit report in 2016 and isn’t now, then it is well past sol in all states, according to this map http://www.creditcards.com/credit-card-news/credit-card-state-statute-limitations-1282.php
Because it takes a minimum of 7 years for a debt to fall off a credit report, so if it wasn’t on the 2016 report and not on there now if it ever existed it is a minimum of 11 years old.
Most companies are not going to sue for such a small amount on such an old debt. I would definitely not pay them without rock solid proof.