To send a postcard, a person must fill in the address of the recipient on it, affix a stamp and drop it into any outgoing mailbox or at a post office. As of December 2014, the minimum postage required to send a postcard in the United States is 34 cents.
Postcards can be purchased at a variety of locations. They are commonly seen for sale at tourist destinations and convenience stores. Any stamp with a face value greater than 34 cents is also acceptable to send a postcard. Those having trouble locating a mailbox or post office can ask a local business if they would put the postcard in their outgoing mail.