1366. An administrator shall deliver over all that he has received in the performance of his duties, even if what he has received was not due to the beneficiary or to the trust patrimony; he is also accountable for any personal profit or benefit he has realized by using, without authorization, information he had obtained by reason of his administration.
Where an administrator has used property without authorization, he is bound to compensate the beneficiary or the trust patrimony for his use by paying an appropriate rent or the interest on the money.