| 摘要 |
An image forming apparatus printing a security document by duplex printing and a method thereof are provided. The image forming apparatus comprises a terminal device interface unit receiving a printing command for printing a printable code data from an exterior terminal device, a printing engine unit printing the code data onto a paper, and a control unit, if the printing command is for printing a security mark data on a rear page of the paper, controlling the printing engine unit to print the security mark data onto the rear page of the paper. Accordingly, the security mark is printed on the rear page of the paper so that the security document can be printed.
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