Form Ps 3800 - Web fill in the certified mail® receipt (form ps 3800) and attach it to the front of your envelope. Web fill in the certified mail® receipt (form ps 3800) and attach it to the front of your envelope. Then pay for the postage and. Then pay for the postage and.
Web fill in the certified mail® receipt (form ps 3800) and attach it to the front of your envelope. Then pay for the postage and. Web fill in the certified mail® receipt (form ps 3800) and attach it to the front of your envelope. Then pay for the postage and.