Image forming apparatus, image forming method carried out by the image forming apparatus, and computer-readable recording medium having image forming program recorded thereon

In order to maintain consistency between stored data and an image formed on a recording medium, an MFP includes an HDD to store data, a data designation portion to designate target data to be an output target from the data stored in the HDD, a prohibition portion to prohibit modification or deletion of the target data, and an image forming portion to generate a composite image by combining the target data with positional information indicating a position in the HDD where the target data is stored and to form the composite image on a sheet of paper.