Abstract: This invention concerns bags suitable for containing bank notes. The bag is made of synthic plastics material and bears a label to receive information about the number of notes and a description of the notes contained or to be contained in the bag. Areas of printing are arranged at each opposite end of the bag so that when the bag is sealed at the ends near the areas of printing the bag connot be opened and the notes extracted from the bag without at least one of the areas of printing being mutilated and the attempt to tamper with the bag being apparent.