text: zip code removed during mail merge in ms word. turned off "smart tags" for addresses in auto correct. no help. using ms word & excel 2002,  xp pro.   cells formatted for zip code in excel. all zip+4 and unique postal codes (for instance: canada) are replaced by a "0" in word after mail merge for labels. also removes the leading zero from zips from ma, nj, etc.,   any way to transfer zip codes as is, instead of word editing them without my asking? i had the exact same problem.  i had to export the excel file as csv and then run the mail merge against the csv file instead of the excel file.  it's not elegant and i don't know why it worked.... but it worked.