19. Following any assignment, whether voluntary or judicial, of rights acquired under section 11, and following any subrogation in the same rights, the loan or sums advanced under the authorized credit may be repaid in advance, without notice and without any fine or penalty being exacted by reason of such repayment.
The repayment may be partial or full and must be made before the thirtieth day after the sending to the transferor of a notice of the transfer or subrogation by registered or certified mail.