Most people use credit repair to fix mistakes and it works well for that purpose. However, the law states that credit bureaus must remove any information that they cannot verify. And errors are not the only potentially unverifiable information.
Another great class of information that you often have trouble with verification is collections debts. Debt buyers constantly buy and resell debt. They take on bad debts, often with incomplete information. That means they may not have enough information to verify that you owe the debt and how much you owe.
That means you can also use credit repair to see if a collector has complete information about your debt. If they don't, the agency will remove the collection account from your credit report. If the agency does not believe that the collector has enough information to collect, it is also not likely that a court will. When you want to use credit repair for this type of strategy, you should work with a professional credit repair service.