يمكن أن تكون الأفعال الانفرادية لدولة على الصعيد الدولي من عدة أنواع، وهي:
In addition to the formal categories of unilateral acts undertaken in the context of treaties (such as ratification, reservation and denunciation) and those which are expressly recognized in international law (such as recognition and protest), there exist a wide variety of possible types and contents of unilateral acts.