This issue can be caused by the mail merge misreading the line breaks in the address block of certain constituent records. To resolve this for the affected records:

1. Place the cursor in the first space of each line of the affected address block. 
2. Backspace to the previous line. 
3. Press Enter to create a hard break before each address line. 

If you are experiencing this issue for more than 20 records and you are using the current version of The Raiser's Edge, click Chat with Support, reference this article, and provide the following information so we can assist you:

• The name and constituent ID of affected records
• A screen shot of affected records and the merge document template
• A copy of your Raiser's Edge database:
  • How do I backup my database using the Blackbaud Management Console (includes video demo)
  • How do I send data and other files to Blackbaud or retrieve data and other files from Blackbaud