Number 6...You have a data duplication issue

If you’re sending emails, direct mail, magazines, etc. to the same person more than once, you have a data duplication issue – and this can be damaging from a cost and reputation perspective. Sending duplicate messages increases distribution costs, reduces customer confidence, and distorts response rates. To avoid these issues, it’s vital you make the best use of tools and processes, to merge duplicate contacts and clean up your list.