5. A print system comprising: a print instruction apparatus that outputs an electronic document for printing and a tentative ID associated with the electronic document; a print apparatus that generates a formal ID uniquely specifying the electronic document or a print medium of the electronic document when printed, that generates code information which contains the formal ID, and that prints the electronic document received from the print instruction apparatus together with the code information onto the print medium, wherein the formal ID is generated at a time when the print apparatus prints the electronic document and includes information indicating a printout time at which the print apparatus prints the electronic document and the code information onto the print medium; and a management apparatus that manages the electronic document; wherein the print apparatus associates the tentative ID and the formal ID, and outputs the tentative ID and the formal ID, which are associated with each other, to the management apparatus, and wherein the management apparatus discards information of the tentative ID after the management apparatus determines, based on the tentative ID, a correspondence between the formal ID and the electronic document.
5. A print system comprising: a print instruction apparatus that outputs an electronic document for printing and a tentative ID associated with the electronic document; a print apparatus that generates a formal ID uniquely specifying the electronic document or a print medium of the electronic document when printed, that generates code information which contains the formal ID, and that prints the electronic document received from the print instruction apparatus together with the code information onto the print medium, wherein the formal ID is generated at a time when the print apparatus prints the electronic document and includes information indicating a printout time at which the print apparatus prints the electronic document and the code information onto the print medium; and a management apparatus that manages the electronic document; wherein the print apparatus associates the tentative ID and the formal ID, and outputs the tentative ID and the formal ID, which are associated with each other, to the management apparatus, and wherein the management apparatus discards information of the tentative ID after the management apparatus determines, based on the tentative ID, a correspondence between the formal ID and the electronic document. 11. The print system according to claim 5 , wherein the print apparatus outputs at least one of the tentative ID and the formal ID to the print instruction apparatus after printing of the electronic document including the code information has been ended.