How long does it take for Certified Mail to be delivered?
It's tough to give an exact answer for this, as delivery times for Certified Mail can vary. The USPS says it will take a minimum of 3 business days, but most letters should arrive within 5 - 6 days. In the event that the postal carrier leaves a note for the recipient to come pick up the letter at the post office, it could possibly even take up to 20 days before the USPS returns it to the sender.
With all of that said, we say to allow 10 business days before you reach out the the USPS regarding the status of your certified letter(s).