An image-forming apparatus includes a first monitor which detects whether a non-paper-medium supplier is attached to the main body of the image-forming apparatus. When a normal copying process is selected, the copying process is stopped immediately if the first monitor determines that the non-paper-medium supplier is attached and an error message indicating that a printing process cannot be performed since the non-paper-medium supplier is attached is shown on the main body. In addition, if a facsimile is received while the non-paper-medium supplier is attached to the main body, the user is informed that the facsimile call is received. Accordingly, the user can change the setting of the image-forming apparatus so that the facsimile can be received. Thus, the facsimile is received manually if the non-paper-medium supplier is attached to the main body and is received by operation after the line is acquired by a handset telephone.