Civil Code, Art. 2071

The guarantor, even before having paid, may proceed against the principal debtor: (1) When he is sued for the payment; (2) In case of insolvency of the principal debtor; (3) When the debtor has bound himself to relieve him from the guaranty within a specified period, and this period has expired; (4) When the debt has become demandable, by reason of the expiration of the period for payment; (5) After the lapse of ten years, when the principal obligation has no fixed period for its maturity, unless it be of such nature that it cannot be extinguished except within a period longer than ten years; (6) If there are reasonable grounds to fear that the principal debtor intends to abscond; (7) If the principal debtor is in imminent danger of becoming insolvent. In all these cases, the action of the guarantor is to obtain release from the guaranty, or to demand a security that shall protect him from any proceedings by the creditor and from the danger of insolvency of the debtor. (1834a)