A printing control apparatus is provided which can produce an appropriate copy-forgery-inhibited pattern image by adding a monochrome copy-forgery-inhibited pattern even if monochrome mode printing is performed in the condition in which a color copy-forgery-inhibited pattern is set. When the monochrome mode printing is performed in the condition in which the color copy-forgery-inhibited pattern is set, and if the copy-forgery-inhibited pattern color is output with its color unchanged, the color is not converted into 100% black. Considering this, when a forced monochrome mode is selected and a user's setting for the copy-forgery-inhibited pattern is color, the user is notified to change a printing mode. Otherwise, the user is notified that the setting of the printing mode and the setting of the copy-forgery-inhibited pattern are conflicting.