Dear Sir or Madam : I am writing to complain about the fact that Capital One is trying to charge a residual interest fee to my account after I was finally able to pay off the entire balance of {$3300.00} on XX/XX/. I made two payments in XXXX, one in the amount of {$110.00} on XX/XX/XXXX  and then a second payment on XX/XX/XXXX  in the amount of {$120.00}. This left me with a balance of {$3300.00} which I successfully paid off on XX/XX/XXXX giving me a {$0.00} balance. 
On XX/XX/XXXX, I received an email from Capital One notifying me that I am being charged {$62.00} for interest fees. When I contacted Customer Service, I was told by a supervisor that I am being charged a residual interest fee and can be charged a second residual interest fee next month as well, which makes absolutely no sense because the whole point of paying off a credit card bill is so you dont have to pay interest. I have always paid this bill on time as I was signed up for automatic payments to ensure that I wouldnt miss a payment and the fact that I made not one, but two payments in XXXX is absolutely ludicrous that now I'm being charged an residual interest fee. When does paying off a credit card stop?