how much is a certified letter usps
$6.74 is the current USPS Certified Mail rate to send a 1-ounce Certified Mail letter with Return Receipt Requested service (old fashioned green card). New 2015 postal rates increased the costs of the Certified Mail fee, First Class postage and the old fashioned green card.ollow this link to learn more about the USPS Certified Mail rates. ï»¿ The US Postal Board of Governors approves all USPS Postal Rates for sending USPS Certified Mail. The cost to send a 1-ounce USPS Certified Mail letter with Return Receipt (green card) is $6.74.