You’ve most likely heard terminology such as Labeling Lists, Drop Ship Destination Data, City-State Files, Zone Chart Data, and so forth, but sometimes it’s hard to figure out what all these terms really mean, and why they are important to your mailing operations. The short answer – the USPS® provides mailers “Destination Data Files” which may be downloaded from the USPS web site. There are a number of different files included in this group, all of which are critical to insure that your mail is prepared properly and is labeled and routed to the correct postal facilities for processing and delivery. This data can – and does – change frequently, so it is critical that mailers pay attention to these changes and update their presort and post-presort software with the new data as soon as it becomes available.
Read more: http://www.windowbook.com/Learning/Postal-Concierge-E-tips