As with Certified Mail, you can purchase Registered Mail service for First-Class Mail, First-Class Package Service or Priority Mail, and you receive a mail receipt at the time you send your mail.

When a sender chooses to mail a parcel certified mail return receipt requested instead of first class (i.e., regular mail), they are electing an alternative method of delivery.

How to send certified mail online Of course, if you can’t find time to go to your old gym and cancel that membership, you might not have time to go to the post office to do it, either.