Even if you receive a general discharge, some particular debts are not discharged under the law. You may still be responsible for most taxes and student loans; domestic support and divorce settlement obligations; most fines, penalties, forfeitures and criminal restitution obligations; debts which are not properly listed in your bankruptcy filing; and debts for death or personal injury caused by operating a motor vehicle, vessel or aircraft while intoxicated on alcohol or drugs. Debts incurred to pay non-dischargeable debts will themselves be non-dischargeable as well. In simpler terms this means that you cannot, for instance, use a credit card to pay your student loans and then discharge the credit card.
Also, if a creditor can prove that a debt arose from fraud, breach of fiduciary duty, or theft, or from a willful and malicious injury, the bankruptcy court may determine that the debt is not discharged.