Bizfluent
bizfluent.com › facts-5838383-difference-certifiedMay 29, 2019 · Certified Mail and a Certificate of Mailing are both add-on services for items you send through regular postal mail, but they differ in their purpose. While Certified Mail will both provide a mailing record and prove the receiver got the item, a Certificate of Mailing only shows that you really mailed it.