In one example, a padlock storage system includes a central portion including a padlock body having a shackle and a key for opening the padlock body. The system includes an upper end having a chamber for accommodating the shackle and a lower end having a chamber for placement of a key. Additionally, a coupling system between the central portion and the lower end allows for rotation of the lower end in relation to the central portion and promotes the unlocking of the shackle, where the key activates the unlocking. The padlock system is operable in two operating positions, where the upper and lower ends are able to attach to each other by removal of the central portion or where the central portion is attached to both ends. When the central portion is removed, a retention capsule for containing the key is formed, and which can be held in an apparatus.