How long does it take USPS to deliver a Certified Letter?

Plan on 3 to 10 business days to send a USPS Certified Mail letter with First Class mail delivery. You can expedite delivery by upgrading to USPS Certified Mail with Priority Delivery. This is normally 2 or 3 day service. USPS Certified Mail is considered Special Service Mail and it does receive high priority delivery service.

USPS Certified Mail provides the sender ‘proof of mailing’ and ‘proof of letter delivery.’  It was not designed to be the fastest form of mail but designed to provide ‘proof’ and meet compliance and regulatory requirements. 

Remember, someone must be available to sign for each USPS Certified letter. If you are mailing to a residential address and no one is home, a delivery reminder slip (Notice) is to be left in the mailbox by the letter carrier. This reminder informs the person that a USPS Certified Mail letter is being held at the local Post Office for pick-up.  They must go to the Post Office to sign for the letter and pick it up. If no one picks up the letter after 15 business days, the letter will be returned to the sender.  If you want USPS to attempt a second delivery attempt within the 15 days, you can schedule a redelivery attempt at