Add the following formatting switch to the mergefield
\# "0;-0;"
inside the closing } after you used Alt+F9 to toggle on the field codes.

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Hope this helps
Doug Robbins - Word MVP
> We would like to hide the zero values in a mail merge
> from a work book with two excel sheets linked into word
> 2002 to create shipping labels with customers name,
> quantity ordered and item name....problem that is
> happening is that zeros are coming through for items not
> ordered