The \b and \f switches are only useful for controlling whether to output something dependent in whether the parent field - in this case BONUS_SCHEME has data; they can't be used to differentiate data. See the
Mailmerge Empty Line Suppression topic in the
Mailmerge Tips & Tricks 'Sticky' thread at the top of this forum:
https://www.msofficeforums.com/mail-...ps-tricks.html