Certified Mail® - The Basics - c360faq.usps.com
https://c360faq.usps.com/s/article/Certified-Mail-The-Basics
webDo you need to send important or valuable mail with proof of mailing and delivery confirmation? Learn how to use Certified Mail, a secure and reliable service from USPS, that lets you track your item online or by phone. Find out what fees and options are available, and how to prepare and mail your Certified Mail item.
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