For a domestic mailing, I'll send your postcard free of charge with standard first class shipping within the United States. In the effort to keep our costs down, I tend to trust our postal service and it works out great "99.9%" of the time. Moreover, in my experience "postcard enthusiasts" are a great community of people who are collaborative and don't take advantage of each other; therefore, I typically do not feel the need to drive up your costs so that I can later prove successful delivery-- I trust you. However, if you want to purchase certified mail services (includes tracking), then please send me a message so that we can make arrangements.