flag a commercial invoice as printed

Summary:

We want to write a report that (amoung other things) will write in the title "Original" or "Copy"

The need is to identify the first report generation as the "Original", having all the rest marked as "Copy"

How can we do this?

Is there a falg indicating in the report (under the job "Print Commercial Invoice Report") has been called ?

and if not - is there an event we can register/listen on mapped to the print commercial invoice event

so we can write a simple OIC integration to flag some DFF in the invoice so we can then know if it has been printed allready?