PO pdf generated for cancelled,on hold,Incomplete,in process Purchase Orders

Hi,

Is there a way to restrict the list of values of 'PO Output for Communication' to only Approved Purchase Orders ?

Currently 'PO Output for Communication' can be run for purchase order with any status and a PDF can be generated.

This is a security risk as PO is a legal document.

If some one sends a PO PDF of an incomplete PO to a supplier, then it is a huge risk.

How other companies are getting around this problem ?

What is the solution ?

Thank you,