File check in report RFKKZE00

Hi Experts,

In my current project we upload text file in which we provide only details of CoCd, Official Document & amount to post payment lot for partial clearing using report RFKKZE00.

Now, the users wants to have a control that a file is not processed twice.

Please let me know if you have faced a similar situation, and how have you implemented proper control to ensure that a particular file is not processed twice.

Thanks

Satyajeet