Image forming apparatus, image forming method, and non-transitory computer readable medium

1. An image forming apparatus comprising:

an accepting unit that accepts an instruction to execute an image forming process; and

a controller that controls the accepting unit so as to allow the accepting unit to accept a print instruction to print a single document when a billing device is used and to prohibit the accepting unit from accepting a print instruction to print a plurality of documents when the billing device is used, and not to prohibit the accepting unit from accepting a print instruction to print a plurality of documents when the billing device is not used, wherein the billing device is incapable of acquiring user identification information for identifying a user.

2. The image forming apparatus according to claim 1 , wherein upon detection of connection of the billing device, the controller controls the accepting unit so as to prohibit the accepting unit from accepting a print instruction to print a plurality of documents.

3. The image forming apparatus according to claim 2 , wherein upon detection of connection of the billing device after power-on of the image forming apparatus, the controller controls the accepting unit so as to prohibit the accepting unit from accepting a print instruction to print a plurality of documents.

4. The image forming apparatus according to claim 2 , wherein upon detection of connection of the billing device after instruction of execution of an image forming process, the controller controls the accepting unit so as to prohibit the accepting unit from accepting a print instruction to print a plurality of documents.

5. The image forming apparatus according to claim 1 , wherein upon detecting that the billing device is ready to perform billing, the controller controls the accepting unit so as to prohibit the accepting unit from accepting a print instruction to print a plurality of documents.

6. The image forming apparatus according to claim 1 , wherein the controller controls the accepting unit so as to permit the accepting unit to accept a print instruction to print a plurality of documents when a user-identification-information acquiring device capable of acquiring user identification information for identifying a user is usable.

7. The image forming apparatus according to claim 6 ,

wherein when the controller permits acceptance of a print instruction to print a plurality of documents, the controller associates the plurality of documents with the user identification information, and

wherein the user-identification-information acquiring device executes a predetermined process for each of the plurality of documents associated with the user identification information.

8. The image forming apparatus according to claim 1 ,

wherein when both the billing device and a user-identification-information acquiring device capable of acquiring user identification information are connected to the image forming apparatus, the controller controls the accepting unit so as to permit the accepting unit to accept a print instruction to print a plurality of documents, and

wherein once the accepting unit accepts a print instruction to print a plurality of documents, the controller executes a predetermined process that is based on user identification information acquired by the user-identification-information acquiring device.

9. An image forming apparatus comprising:

an accepting unit that accepts an instruction to execute an image forming process; and

a controller that

controls the accepting unit so as to allow the accepting unit to accept a print instruction to print a single document when a first billing device connected to the image forming apparatus is used, the first billing device being incapable of acquiring user identification information of a user, and to prohibit the accepting unit from accepting a print instruction to print a plurality of documents when the first billing device is used, and

controls the accepting unit so as to permit the accepting unit to accept a print instruction to print a plurality of documents when a second billing device connected to the image forming apparatus is used, the second billing device identifying a user and billing the user for execution of an image forming process.

10. An image forming method, comprising:

accepting an instruction to execute an image forming process with an accepting unit of an image forming apparatus; and

performing control so as to allow the accepting unit to accept a print instruction to print a single document when a billing device is used, and to prohibit the accepting unit from accepting a print instruction to print a plurality of documents when the billing device is used, and not to prohibit the accepting unit from accepting a print instruction to print a plurality of documents when the billing device is not used, wherein the billing device is incapable of acquiring user identification information for identifying a user.

11. A non-transitory computer readable medium storing a program causing a computer to execute a process, the process comprising:

accepting an instruction to execute an image forming process with an accepting unit of an image forming apparatus; and

performing control so as to allow the accepting unit to accept a print instruction to print a single document when a billing device is used, and to prohibit the accepting unit from accepting a print instruction to print a plurality of documents when the billing device is used, and not to prohibit the accepting unit from accepting a print instruction to print a plurality of documents when the billing device is not used, wherein the billing device billing is incapable of acquiring user identification information for identifying a user.

12. An image forming apparatus comprising;

a display unit that displays information, and

a controller that controls the display unit so as to display a document selection screen on which only a single document is selectable when a billing device is used, and to control the display unit to display a document selection screen on which multiple documents are selectable when the billing device is not used, the billing device billing a user for execution of an image forming process and being incapable of acquiring user identification information for identifying a user.