A hand-held device and a method for affixing a seal impression on a paper document are provided. The hand-held device includes a processor, a memory unit, an input unit, and a seal impression generation unit for generating a seal impression. The processor generates a file code in response to a file code generation request and generates a control signal. The seal impression generation unit generates a seal impression according to the control signal of the processor. After the seal impression is affixed on a paper document, the processor generates a log file in response to a log file generation request.