Preparation and invalidity of international treaties

International treaties have come to the fore every day, increasing their influence and weight over the states from the first appearance to the day-to-day, and they are the indispensable sources of international law. International agreements are just a few of the reasons that the areas they are organizing are so wide, they put the states under their obligations to each other, the obligations are not fulfilled, and various sanctions are imposed on the states. In the same way, the international arena has increased the importance of international treaties, international treaties, and international agreements as a resolving source of disputes, in the dispute before the International Court of Justice (ICJ), which has jurisdiction and jurisdiction. International treaties are made through the completion of several successive stages. Not only it is possible to define these steps in three ways as; creation of treaty text, and acquiescence of the treaty, provision of treaty, but also each stage has many complex operations in its own right. Both registration of the treaties and the nature of the registration are assessed in the stage of provision of the treaties. In the international arena, validity of treaties is as much important as signing of treaties. In this context, a treaty must be made in accordance with international law and be free from any grounds of invalidity in order to be able to create certain rights and obligations to the States Parties. Otherwise, it would be possible for the States parties to avoid the obligations they had previously entered into through this treaty, arguing the invalidity of the treaty. Key words: Causes of invalidity of international treaties, preparation of treaties, invalidity of the treaties, preparation and invalidity of the treaty, the Vienna Convention on the Law of Treaties.