how to delete the pdf or *.out file after printing the checks in R12

 Hi ,Need your help,in 11i we were having the customization to delete the checks pdf after printing or if we cancelling it.

Now in R12 we are using the OAF pages. there through payment process we are printing the checks so we are confuse how to delete the pdf or *.out file from out directory after printing the checks.

In short How to handle this in R12 for security reasons