Credit repair companies can help when debt collectors attempt to collect an expired debt you no longer legally owe. Most credit repair companies employ lawyers to assist with these processes. The company’s employees send official cease-and-desist letters to get these collectors to stop contacting you. Negotiating with creditors may help remove inaccurate or out-of-date marks from credit reports, improve credit histories and increase credit scores.
Credit scoring models usually take into account how much you owe compared to how much credit you have available, called your credit utilization rate or your balance-to-limit ratio. Basically it's the sum of all of your revolving debt (such as your credit card balances) divided by the total credit that is available to you (or the total of all your credit limits).