I would like to add text 'This page intentionally left blank' to blank page (with header) but I would like to this text appear in pdf but not in the printed document. Is it even possible? If so, how?
This sort of thing is normally accomplished by adding a switch at the top of the preamble (See How to make a switch for print vs. display versions of a document with respect to links/URLs).
Personally I don't like "this page intentionally left blank pages". For starters once the sentence is typeset the page is not blank anymore and it really underestimates the intelligence of readers.
So, I would rather have an epigraph or epigraphs, but modify the code to suit:
The switch is a simple