How many stamps should you put on a letter going from Pennsylvania to Oklahoma?
One, as long as it is 45 cents and the letter is 1 ounce or lower.
I don't know how Wyoming food stamps work, but I receive food stamps in Oklahoma and I have been able to use them in Colorado, Texas, Tennessee, and Virginia (and I'm pretty sure I could use them elsewhere). If you're not sure try to purchase one inexpensive item from the grocery first (like a 20 oz soda) and see if the purchase goes through.
I can go to my local post office! They sell Thai postage stamps. They don't sell US stamps. I think you're a little confused - you can buy stamps wherever you live to send things to any part of the world. You don't need to use British stamps to send a letter to England. You can buy other kinds of stamps from other countries, you would have to find someone that can import them. You…