Learn about PS Form 3877, also known as the Firm Mailing Book for Accountable Mail, including what it's used for and why it's so important to the certified mail process.
If you’ve confused the two before, don’t worry. Even the USPS has trouble keeping them straight sometimes. This article explains the differences between these two seemingly similar extra services.
Learn everything you need to know about the Certificate of Mailing extra service, including what it does, when it's used, how much it costs, and how to use it.
Certified Mail is complex. There's forms to keep track of, options for a variety of mailing needs, and prices seem to always be changing. We've compiled everything you need to know here.
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