Because they may be able to fix your credit and deal with your creditors so you can avoid filing for bankruptcy. (creditinfocenter.com)
If you have a debt management company deal with your creditors on your behalf the creditors will report those negotiations to credit reporting agencies. (debtfirms.com)
You will need that report in dealing with creditors, the credit bureaus, and possibly the courts. (creditpilgrim.com)