A purchaser of immovable property who has paid the purchase price but failed to take transfer has only personal rights under the contract of sale, not real rights in the property. Real rights are only acquired through registered transfer. Where property has been transferred to and registered in the name of a subsequent purchaser, that registered owner has real rights that prevail over the earlier purchaser's personal rights. Under the rei vindicatio principle, an owner with registered title cannot be deprived of property against their will, and this principle favours the registered owner against any person claiming under personal rights alone. A purchaser with only personal rights must seek their remedy against the seller for breach of contract, not against the registered owner of the property.