My wife and I are trying to clean up our credit as best we can prior to applying for pre-qualification on mortgages. I just did one round of disputes on-line with all of the big three. All of them were reporting inaccurate info that cannot be verified....HOWEVER I just noticed a couple of additional (one big) mistake on my report. Question : Can I also write a letter of dispute to the CB's? Even though I already disputed on-line? Thanks in advance for any help.