Who Must Have a General Vendor License? You must have a General Vendor license if you sell, lease, or offer to sell or lease goods or services in a public place that is not a store. You do NOT need a General Vendor license if: You sell newspapers, periodicals, books, pamphlets, or other written matter.
In addition, the Postal Service has released the Butterfly stamp, now costing 68 cents, specifically for square greeting cards. With this one stamp, consumers can be confident that their Treasures cards weighing less than one ounce will reach their destination with no additional postage required!
The current postage needed for an international postcard stamp is $1.15 for a standard shaped and size one, in fact it's the same price for a letter of 1oz or less. The USPS lowered the rate from $1.20 back to $1.15 in middle of 2016.