Many people who look into their reports find that their credit information has errors and those errors usually affect your credit negatively.
Maintaining an accurate score sometimes requires us to be pro-active, and we must write letters to remove information off our credit report. These are sent to the big 3 credit bureaus. Although in many cases the first thing most people want to do is to call the Credit Bureau and tell them off, this would be counterproductive. Instead the best method would be to sit down and write a credit report dispute letter.