Before going to court, it is customary and appropriate to contact the opposing party in order to exhaust attempts to resolve the dispute outside the courtroom. Sending a warning letter before a lawsuit conveys seriousness and determination, and often leads to a quick settlement or payment of the debt. In order for the effect to be maximum and for the other party to be unable to deny receipt of the appeal, it is important to ensure that the document reaches them directly in a documented and official manner.