LOR= Letter of Request
SAE= Self addressed envelope (sometimes stamped addressed envelope)
SASE= Self addressed stamped envelope
PP: Pre-print (a print of a signature, not a real autograph).
You can send an international request without any return postage if you want, but you run a greater risk of not getting a reply. Sending return postage will double your chances.
There are lots of topics about how to obtain international postage so please do browse them

IRC's have been withdrawn from sale in alot of countries now including the UK & US.
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