What is a USA First Class Forever Stamp?

[BlueJaysRock]

I've gotten many successes through email requesting from the U.S. Some of the envelopes came with the "First Class Forever Stamp" on the envelope free of markings. Does that mean I can reuse them on SASE going to the U.S.? How many stamps does it take to send a single card in a normal sized envelope from the U.S. to Canada?

Thanks

[Oxxon]

The First Class Forever Stamp was created for when the US PO changes the price to send a first class letter. Right now its .44 cents but if they change the price to say .46 cents, and they will, the stamp you bought @ .44 cents is still good without having to go out and buy .2 cents stamps. I'm not going to say that you should reuse uncancelled stamps but, oh well.

[BlueJaysRock]

I have only done 2 ttms in Canada. The 1st 1 I want to do for the U.S. is a player I really LIKE!