Invalid
Merge Fields
When you change the record source and choose a different
Recipient List, Microsoft Word will check your document for potential
problems.
4. What Do You See? Word compares your Mail Merge
Fields with your new Recipient List. If there is a problem, Word will
notify you. The dialogue box asks if you want to
remove the Merge field from you document or replace it.
Which should you choose? Let's look at the data in the lists.
Exam 77-425 Microsoft Word 2013 Expert
3.0 Create Advanced References
3.3 Manage forms, Fields, and Mail Merge Operations: Troubleshoot Mail Merge Errors