The joint and several debtor sued by the creditor may raise defences common to all the co-debtors, such as nullity or resolution, and those which are personal to him. He may not raise defences that are personal to other co-debtors, such as the granting of a term. However, where an exception that is personal to another co-debtor extinguishes the latter’s divided share, in particular in the case of set-off or remission of a debt, he may rely on it to have it deducted from the total debt.