Credit Karma is pretty good for what it is, but it sounds like you need to go to the source(s). If you aren't aware, you are entitled to one free credit report per credit bureau per year. Take advantage of that and be sure to get the report from all 3 bureaus individually (ignore any ads or whatnot that want to charge you a fee for it - it's totally free). Go to Annual Credit Report's website and you can order them there from each of the bureaus.