Article 442 of Civil Code

1- In the event of denial, an action shall not be heard after the expiry of one year if it concerns any of the following rights: A- The rights of merchants and manufacturers in respect of things they supplied to persons who do not trade in them, and the rights of hotel and restaurant proprietors in respect of accommodation charges, the price of food, and everything they expended for the account of their customers. B- The rights of domestic servants and persons of equivalent status. 2- Whoever invokes the bar to hearing the action under the preceding paragraph must swear an oath that he has actually paid the debt. If he is an heir of the debtor or a legal representative of the debtor or his heirs, he shall swear that he does not know of the existence of the debt or that he knows it has been paid. The court shall administer this oath of its own motion.