If you want to order a cryptographic device from the LuxTrust certificate authority (signing stick, smartcard, authentication token, etc.) then you will be required to present yourself at a "registration authority" desk with original ID papers, for physical authentication, before the order makes it way to LuxTrust.
Problem is, the list of registration authorities is supposed to be given by following a link to https://ra.luxtrust.lu
while in fact this link is broken and results in a 404.
The correct page can be found at this address: https://www.luxtrust.lu/en/simple/206