Preparing for Successful VDP

What can you do to fix these addresses? Maybe the bigger question is why should you be concerned about fixing them? Let's say you sent out a 20,000-piece mailing and 5 percent of your addresses were deemed undeliverable, and of the pieces that were delivered there was a 4 percent response rate, which generated an average sale of $200. The lost revenue from these bad addresses would be $8,000 (i.e., 20,000 pieces x .05 undeliverable addresses x.04 response rate x $200 per sale). And that does not consider the lifetime value of a customer.