747. All gifts inter vivos, of movable or immovable property, must be registered; save the exceptions contained in the following article. The donor himself or herself cannot set up the want of registration, neither can the donee or his heirs; but it may be set up by any person entitled to do so under the registry law, by the heir, legatee, or creditor of the donor, or by any other persons interested in having the gift declared void.