Yes, unless there was an early termination clause in the contract pursuant to which you are going to school which allows you out of the school without owing all the money, when you signed up, you obligated yourself for the full tuition. They cannot be double paid--to extent they have received the money from loans or other sources and do not need to repay it or return it, they cannot also get that money from you. But any amounts of the tuition which are not paid to them from other sources, you will be responsible for, and they could sue you for that money if you do not voluntarily pay it. (If they try to sue you for money they received from loans or other sources, you would raise "satisfaction" as a defense--that the debt was "satisfied" by being paid by others.)