What is a ‘Form 1583’? Form 1583 is a required USPS form. It authorizes Shop2Ship to receive mail on your behalf. By admin|2018-01-30T23:53:14+00:00January 4th, 2018|General Questions|0 Comments Share This Story, Choose Your Platform! FacebookTwitterLinkedInRedditWhatsAppTumblrPinterestVkXingEmail About the Author: admin Leave A Comment Cancel reply Comment Save my name, email, and website in this browser for the next time I comment.