A printer may include a controller configured to: in a case where a predetermined instruction is obtained from a user under a situation where a service state of the printer for receiving a print job providing service from a server is a disabled state, shift the service state from the disabled state to an enabled state; in a case where a registration instruction to register printer information related to the printer in the server is obtained, send the printer information to the server; in a case where the registration instruction is obtained under the situation where the service state is the disabled state, shift the service state from the disabled state to the enabled state without obtaining the predetermined instruction from the user.