An image forming apparatus of the invention packs a plurality of image prints in a bag as finished prints corresponding to an order a user made and outputting the bag containing the plurality of image prints. At first, the apparatus records each of the plurality of images on a recording medium based on image data which is reproduced corresponding to each of the plurality of images, thereby to produce the image prints on an image-by-image basis. Next, it judges whether the bag needs to be sealed or not when the plurality of image prints thus produced are packed in the bag as the finished prints corresponding to the order. Next, it packs the plurality of image prints in the bag as the finished prints corresponding to the order and seals the bag containing the plurality of image prints based on a result of the judging. Thereby it outputs the plurality of image prints contained in the sealed bag. The judgment of whether the bag needs to be sealed or not is performed by checking appropriateness of each of the plurality of image prints or the judgment is based on order information corresponding to the order.