Image forming apparatus and control method of switching function usable in image forming apparatus based on contract information of apparatus main body and consumable

A control method of controlling an image forming apparatus, the image forming apparatus comprising:

• an apparatus main body;
• an apparatus memory configured to store first type information, the first type information indicating whether the apparatus main body is a contract apparatus or a normal apparatus, the contract apparatus being usable in a case where an apparatus contract for the image forming apparatus is set, the normal apparatus being usable regardless of whether the apparatus contract is set;
• and a consumable attached to the apparatus main body, the consumable including a consumable memory configured to store second type information, the second type information indicating whether the consumable is a contract consumable or a normal consumable, the contract consumable being usable in a case where a consumable contract for the image forming apparatus is set, the normal consumable being usable regardless of whether the consumable contract is set, the control method comprising:
• determining whether the first type information indicates that the apparatus main body is the contract apparatus:
• determining whether the second type information indicates that the consumable attached to the apparatus main body is the contract consumable;
• and
• switching a function usable in the image forming apparatus based on a combination of the first type information and the second type information,
• wherein the contract consumable and the normal consumable are unusable in a case where the apparatus contract for the image forming apparatus is set and the consumable contract for the image forming apparatus is set and a period for the apparatus contract ends, and
• wherein the contract consumable is unusable and the normal consumable is usable in a case where the apparatus contract for the image forming apparatus is not set and the consumable contract for the image forming apparatus is set and a period for the consumable contract ends.