EFFECTS OF GUARANTY BETWEEN THE DEBTOR  AND THE GUARANTOR

 
Art.  2066.  The guarantor who pays for a debtor must be indemnified by the latter.
 
The indemnity comprises:
 
      (1) The total amount of the debt;
 
      (2)  The  legal  interests thereon  from  the  time  the payment was made known to the debtor, even though it did not earn interest for the creditor;
 
      (3) The expenses incurred by the guarantor after having notified  the  debtor  that  payment  had  been  demanded  of him;
 
      (4) Damages, if they are due. (1838a)
 

EXCEPTIONS TO THE RIGHT TO INDEMNITY AND/OR REIMBURSEMENT

1.   Where the guaranty  is constituted  without the knowledge or against the will of  the principal debtor, the guarantor can recover only insofar  as  the  payment had been beneficial to the debtor

2.   Payment by a third  person  who  doesn’t  intend  to  be reimbursed  by  the  debtor  is  deemed  to  be  a  donation, which,  however,  requires  the  consent  of  the  debtor. But the payment is in any case valid as to the creditor who has accepted it.   

3.   The right to demand reimbursement is subject to waiver.