How to reduce delivery errors with USPS forwarded mail and vacant addresses

Working at USPS, things like forwards, vacants, and hold mail are the easiest to treat as minor issues when you're busy. It's really annoying when a mistake actually happens: the customer says they moved out a long time ago, but mail is still being delivered; a forward piece gets sent back to the old address; or a vacant card isn't updated, and the mistake continues the next day. I eventually…