Yes but it also adds an entry to a mail list update dataset that USPS sends out. I worked at a company that had a magazine and every month USPS would send a CD

Yes but it also adds an entry to a mail list update dataset that USPS sends out. I worked at a company that had a magazine and every month USPS would send a CD with an updater. I never looked into how the technology worked but it allowed a sender to auto update their database to the new address.