I received an offer from an entity promising to eliminate certain debts that I owe. An OCC complaint form was included in the information they sent. I was asked to sign it but provide no additional information. Is this a legitimate offer?

No. You should contact your bank or lender if you have any questions about the debts you owe. Your lender is in the best position to work with you to correct mistakes or create a workout plan. If you need to modify your obligations or request that a lender not exercise its rights with respect to a debt (for example, its right to foreclose on mortgage property if you are in default), you should contact the lender directly to discuss whether mutually satisfactory arrangements can be made, without delay.