An image forming system includes a confirmation processing portion and first and second print controlling portions. The confirmation processing portion confirms one or more pages of a multiple-page document as one or more confidential print pages. The first print controlling portion, upon receiving an execution command for a confidential print job according to which the document including the confidential print pages is printed, prints one or more normal print pages that are pages to be printed according to the confidential print job that exclude the confidential print pages, and suspends printing of the confidential print pages. The second print controlling portion prints, when it is determined that the sender of the execution command for the confidential print job has arrived at the location where the image forming apparatus is installed, the confidential print pages among the pages to be printed according to the confidential print job.