Informed Delivery® - Change of Address - USPS
https://faq.usps.com/articles/FAQ/Informed-Delivery-Change-of-Address
WEBAfter you submit an Official Change of Address (online at moversguide.usps.com, in-person at a Post Office™, or through your mail carrier), you will receive an email and a physical letter with a 9-digit alpha-numeric code requesting confirmation of your change of …
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