Tagout devices, such as a LOTO tag, are visible warning signs that are securely tied to an energy-isolating device to indicate that it is being isolated and may not be operated until the lockout device is officially removed.
They also serve as a way of identifying who locked out the machinery, the date and time of the lockout, and the department for which the individual works. Additional information, such as a beeper number, extension number, and other relevant identifiers, can be put on the tag.