Glossary

Mail Delivery Service Levels

Overview

Learn about the four USPS Mail Service options available on DocuPost to make the right selection depending on your criteria.

Service Options by Mail Type

In DocuPost, there are four Mail Service options for the three types of Mail document types we offer to process and deliver to USPS that you can view in the table below.

Mail Type	USPS First Class (non-certified)	USPS First Class Certified	USPS First Class Certified with Return Receipt	USPS Standard
Letters	✔️	✔️	✔️	✔️
Postcards	✔️	❌	❌	❌
Checks	✔️	❌	❌	❌

Letters can be sent through all four Mail Service options.
Postcards can only be sent via USPS First Class (non-certified)
Checks can only be sent via USPS First Class (non-certified).

Letter & Postcards Mail Service Detail Breakdown

If you are new to DocuPost and you would like a comprehensive and comparative view of what sending letters and postcards across common criteria, look below.

Mail Service	est. Delivery Time	Mailing Status Details	USPS Tracking Link	USPS Delay Information	USPS Proof of Delivery
USPS First Class Certified Mail w/ Electronic Return Receipt	3-10 days	Preparing, On the way, See Tracking / Delivered	✅	May be available via USPS link	Available via USPS link. Electronic Return Receipt can be requested from USPS.com tracking page.
USPS First Class Certified	3-10 days	Preparing, On the way, See Tracking / Delivered	✅	❌	Available via USPS link
USPS First Class (non-certified)	3-10 days	Preparing, On the way, Processed for Delivery	❌	❌	❌
USPS Standard	5-20 days	Preparing, On the way, Processed for Delivery	❌	❌	❌