Hi! ;)
I've noticed that there are some successes from the United Kingdom but with US stamps on the envelope.

Now I know very well that you cannot use another country's stamps, but how come this seems to work? I've had people telling me that I can even use South African stamps on my SASE (which I still don't believe) as long as it covers the full postage. Can anyone help me with this and tell me how exactly it works (if it even does)?
Thank you!
