An alternative field code is:
{IF{=MOD({PAGE},2)}= 1 "{QUOTE 12}This page intentionally left blank"}
This will automatically insert a blank page if the page on which they occur is an odd-numbered one.

To get the same effect for an even-numbered page, change the '1' to '0'.

Such a field would be used with ordinary 'Next Page' Section breaks (ie not an odd or even 'Next Page' Section break) to separate chapters and placed after the final '.' in each chapter (ie immediately before the 'Next Page' Section break).

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]