Image forming apparatus and image forming system including the same

An image forming apparatus comprising:

• a storage unit for storing a primary key as an activation key issued from an external official activation key issuing system and for storing a key issuing program for additionally issuing the activation key based on the primary key;
• a reception unit for receiving an instruction to issue the activation key that can be used in another image forming apparatus belonging to the same local network as the image forming apparatus, the another image forming apparatus being installed with an inactivated application;
• a control unit configured to generate the activation key that can be used in the another image forming apparatus, on the basis of the primary key and the key issuing program, when the reception unit receives the instruction to issue the activation key;
• and
• a printing unit configured to print generated key information to be input to the another image forming apparatus when using the activation key generated by the control unit in the another image forming apparatus on a sheet to output the sheet.