Juristic acts and contracts are made when both parties agree to voluntary acts, the immediate purpose of which is to establish juristic relations, between each other to create rights movement and made lawful it, namely no have object to be expressly prohibited by law or is impossible, or is contrary to public order or good morals, by the party to the contract called offeror, made offer to another party called offeree, made counter offer to offeror when offer and acceptance intent to be identical them