All matrimonial agreements shall be drawn up by deed before a notary, in the presence and with the simultaneous consent of all the persons who are parties thereto or their proxies.
When the contract is signed, the notary shall issue the parties with a certificate on plain paper and free of charge, stating his name and place of residence, the surnames, forenames, qualities and residences of the future spouses, and the date of the contract. This certificate states that it must be given to the civil registrar before the marriage is celebrated.
If the marriage certificate states that no contract has been made, the spouses will, with regard to third parties, be deemed to be married under the common law regime, unless, in the acts concluded with these third parties, they have declared that they have made a marriage contract.