If you are posting it in the US, yes. As long as the amount on the stamp covers the overseas postal charge.
As postage to mail something like a letter.
To mail a single letter to Canada, the stamp must be equivalent to the postage cost. As long as the stamp is equal to the postage, any letter can be sent with any kind of postage stamp.
That is what you do with a stamp, put it on a letter to pay for it to be delivered. You always use the postage from the country you are mailing the item in.
a letter weighing 1 gram to Eire, what postage do I need?
Type your answer here... Can I use a 55 cent Alice Hamilton stamp to mail a letter todayi?
Whatever the first class rate of postage is on the day you use it to mail a letter.
Yes, as long as the total postage affixed equals the current postage rate.
Nope, or maybe yes.... I have no Idea
Have to use postage from country of origin
You can use as many stamps as necessary to add up to the required postage. It doesn't matter what amounts each one is as long as the added amount is what is needed to mail it
yes, indeed -- there are called "forever" because they will still be valid for postage even if rates go up.
Yes, they are still valid for postage in the US. Your total value must still meet the proper amount. Currently in the US that is 44 cents for mail.