I am in the process of disputing late payments with Kia Financial...I haven't mailed the letter yet because I was waiting on bank statements to prove that I wasn't late. The argument is that the day the payment posted to my bank account was maybe 1 to 2 days after the grace period. I know that when an ACH payment is done over the phone, it will take at least 2 days for it post to the bank account, but it will post to the car accout that same day. I called in to get a mailing address for disputes and the Customer Service Rep offered to go over the info w/me before I send the letter in. Is that wise to do or should I just send the info in to the dispute dept. to let them handle it. Oh yeah, the lates date back to 2004 and 2005...is it even worth it?