An image processing apparatus includes: an information obtaining portion that obtains association information indicating an association between a first and second portable terminal apparatus from an association information storage, the first portable terminal apparatus having a proper permission to use a function of the image processing apparatus from the first portable terminal apparatus, the second portable terminal apparatus having a temporary permission to use the function from the second portable terminal apparatus in place of the first portable terminal apparatus; a data storage that stores data caused by a process between the image processing apparatus and the second portable terminal apparatus; an online terminal detector that detects the first portable terminal apparatus as being online; and a data provider that provides the data to the first portable terminal apparatus from the data storage when the online terminal detector detects the first portable terminal apparatus as being online.