I have a Capital One credit card that had a "$40 Maximum Delinquency of 30 days in 2011". It was paid after 30 days in 2011 and was a simple mistake from an annual auto renew charge for a website hosting company. I haven't used that card in a couple of years. Should I call capital one and seeing if they'll remove that? If so what is the best way to go about it (e.g. phonecall, letter, both)? Or is it best to leave it alone because it might renew something or cause them to cancel that credit card that is my oldest line of credit and hasn't been actually used since that payment in 2011?
Since it was a mistake on your part, it may be difficult to have it removed from your credit report. Late payments take 7 years to drop of credit reports, and since you are 4 years in, it may make more sense just to leave it alone, as the simple act of contesting it could cause the clock to reset.
Your credit report is supposed to be an accurate reflection of what has happened in your credit history. It is accurately reflecting that you were late so to file a dispute would be a form of fraud. You would be attesting that what was written was incorrect when you know that it is not.