3156. A decision rendered by default may not be recognized or declared enforceable unless the plaintiff proves that the act of procedure initiating the proceedings was duly served on the defaulting party in accordance with the law of the place where the decision was rendered.
However, the authority may refuse recognition or enforcement if the defaulting party proves that, owing to the circumstances, he was unable to learn of the act of procedure initiating the proceedings or was not given sufficient time to offer his defence.