Do you keep your receipts when you make any bank transactions? Well you should. According to this man Toshi, he has already paid the $4909.03 in full. However, American Express still sent a 3rd party creditor to collect the "debt".
Luckily for Toshi, he managed to avoid paying it again as he kept the receipts from 11 years ago! Many of us would have already threw away the receipts. I guess it's a good thing to be a hoarder sometimes.
However, Toshi mentioned that American Express simply said sorry and moved on. Well, at least the issue got cleared up.