I'm having little issues understanding what S.A.S.E and S.A.E. mean exactly. The description on Wikipedia is a little bit confusing because it says that it's literally the same. But from the context on some qrz.com pages I get an impression that there is a difference.
As I understand, S.A.S.E means a filled envelope where I'm a receiver and the OP I had QSO with is a sender, also the envelope has the postage stamps that would be accepted by the postal service in OP's country. The obvious issue here is that it's unlikely that Russian postage stamps will be accepted by US postal service, not mentioning that service prices differ. I asked this question in a local post office - there is no other way (at least in Russia) to pay for a reply mail except postage stamps, and they can't promise that Russian postage stamps will be accepted worldwide or even specifically in US. In other words, if OP accepts only S.A.S.E there is no way for me to receive his QSL card.
S.A.E, as I understand it, is the same but without postage stamps. In other words, OP asks only to include a filled envelope. To put a few "green stamps" (US dollars) might be a good idea, but it's not strictly necessary unless it's mentioned explicitly.
Here are a few examples from qrz.com:
If you want a paper QSL it will be necessary for you to send me your card via Direct Mail with either a S.A.S.E. or a S.A.E.
My understanding is that just to include a S.A.E will be OK. OP doesn't ask for any "green stamps" but to include 1 or 2 GS might be a good idea nevertheless. (Is there any chance that including green stamps in this case may offence him or her?)
For direct QSLs, send SASE or SAE w/green stamps.
OP asks for S.A.E. and green stamps, in plural. Thus I have to send S.A.E and at least two green stamps.
Is my understanding of S.A.S.E and S.A.E. right or there is something I got not exactly right?