http://e5fc3et2gcsvmii4f6mrjgapd22azni6iu6pm54m44aewfmohvvnnpid.onion/faq
ADDRESS AND ENCRYPTION Question: What should I pay attention to? Answer: Avoid strange characters, write Bjorn in stead of Bjørn and Strabe in stead of Straße. Answer: Write in English, Germany in stead of Deutschland and Athens in stead of Athena. Answer: Do not write other things than your address, do not preface your address with "Name:" and "Street:" etc. or add "," to the end of address lines.