Ask at your local post office for information about : -
"International Reply Coupons".
Alternatively ask if they sell "International Stamps", which are
available in many countries for just that purpose.
Dan Reynolds wrote:
Hello, I am sending a letter to England requesting information. I don't
know how to stamp the envelope I am enclosing. Can the kind of stamp I
will be using on the outside envelope be used to return it back to me? If
not, should I send money for the cost of postage? American money? I
would appreciate some advice on how to do this. Thank you. Marilyn