What type of signature is prohibited on the service tag?

The prohibition of a stamped signature on the service tag is rooted in the need for authenticity and traceability in fire extinguisher maintenance. A stamped signature does not provide a personal acknowledgment by the technician, which is crucial for verifying that the work was done by a qualified individual. It can easily be reproduced and lacks the uniqueness of a handwritten or electronic signature, undermining the credibility of the service record.

In contrast, handwritten signatures establish a direct link to the individual who performed the service, providing assurance that the maintenance was carried out appropriately. Electronic and digital signatures, when used correctly within regulatory guidelines, can also be valid and effectively verify a technician's compliance with safety standards. These methods ensure trackability and accountability in service records, which is essential in fire safety practices.