Note: A Premier Plan or above is required to use Certified Mail. Click here to learn more and upgrade! Take your Stamps.com account to the next level, and stop worrying about filling out your Certified Mail forms by hand. Print all the required information and barcodes on to these convenient 3600 series Certified Mail Labels, print, stick and mail! Certified Mail done the easy way! Use provided #10 Certified Mail Window Envelopes Certified Mail tracking number is recorded by Stamps.com so you can view all tracking events including delivery