I'm sure NPH would have no problem sending back to you as long as you have the right amount of postage.

Actually, looking at the successes on here, they're all PP so I wouldn't even waste my money.

Getting return postage from another country is easy.
For the USA you will need US stamps on your SAE (Bri0626 here on the forum sells US stamps), you can send a few $1 bills (available through a bank or travel agent) or something called International Reply Coupon which may or may not be available from your Post Office.
Please have a browse of this forum because there are a ton of questions about international return postage

Hey there, I was just looking hopefully for finding a way to contact with Neil Patrick Harris, and I saw these amazing feedbacks.
OMG, I loved them. I really wanna send a photograph to him, and my other favorite celebs (Misha Collins, Jensen Ackles, Joshua Jackson etc.)
But there is a problem. I live in Turkey. Of course, this is not a problem for me send something to USA, but I'm not sure if they send back? You know, we have an ocean between us.
Is there anyone who gets feedbacks from other countries? Thanks for the answers already! And oupss, sorry for my awful English, hope you understood!!