Article 316 of Civil Code

1 - If the debtor's disposition gives preference to one creditor over another, the creditor may seek to have the disposition declared ineffective against him, subject to the provisions of Articles 310 to 313. 2 - If an insolvent debtor pays one of his creditors before the expiry of the term, the other creditors may seek to have the payment declared ineffective against them. However, if the debtor pays the debt after the expiry of the term, the creditors may not seek to have the payment declared ineffective unless it was made through collusion between the debtor and the creditor who received payment of his claim.