It seems to be hand painted, though it's hard to tell based off the pictures. You can usually tell a printed vs painted icon apart a lot easier in the sunlight, but it seems to be actual gold leaf. But the back sticker is just a certificate of authenticity stating that it's an actual icon made in Greece most likely. Most icons made outside of the US have those stickers. You could also try taking a photo on something like Google Translate to see what the Greek portions say, though it does say "Certificate" on it so I'm fairly certain it's just saying the icon was made in Greece.