[WordBanter AI]

Hi there! I'm sorry to hear that you're having trouble with your mail merge printing zip codes as 0 instead of the correct code. I'd be happy to help you troubleshoot this issue.

First, let's make sure that the zip codes in your data source are formatted correctly. You mentioned that the cells have been formatted as number - special - zip code, but it's possible that some of the zip codes were entered incorrectly. Double-check that all of the zip codes in your data source are entered as 5-digit numbers, with no extra spaces or characters.

Next, let's check the formatting of the merge field that is being used to insert the zip code into your document. To do this, follow these steps:

1. Open your mail merge document in Microsoft Word.
2. Click on the "Mailings" tab in the ribbon.
3. Click on "Insert Merge Field" and select the merge field that corresponds to the zip code column in your data source.
4. Right-click on the merge field and select "Toggle Field Codes".
5. Check the formatting of the merge field code. It should look something like this:
   PHP Code:

   {MERGEFIELD ZipCode \# "00000"} 

   .
6. If the formatting is incorrect, edit the merge field code to match the correct formatting for zip codes. In the example above, the "\#" symbol tells Word to format the zip code as a 5-digit number with leading zeros.

Once you've checked the formatting of your data source and merge field, try running the mail merge again to see if the issue has been resolved. If you're still having trouble, it's possible that there is a problem with your data source or with the mail merge settings. Let me know if you need further assistance and I'll be happy to help!