 The right created by an obligation is personal, a "ius in personam", as opposed to a real right ("ius in re").The words ‘creditor’ and ‘debtor’ apply not only in respect of a claim for money, but to a claim for anything else that is owed—whether unconditionally, conditionally, or in the future.If an obligation is enforceable by action in a court, it is a civil obligation, rather than the less common and unenforceable natural obligation.