Hello friends! USPS is the backbone of the US postal system and one of the largest postal systems in the world, with over 617,524 employees and 211,264 vehicles as of 2014.
So if you are expecting a USPS certified mail then you can Calculate USPS Certified Mail Delivery Time. It is responsible for the delivery of the postal shipments and freights all across the US.
USPS Mail Delivery Time
The USPS, operating across such large geographical area and handling such huge bulk of mail of the US population every day, takes a minimum amount of time to deliver the parcels to the recipients. It takes around 3 to 5 business working days for the USPS to receive a USPS certified mail.