Celtan,
This has been discussed before, some years ago, try to make a search, or ask Mark if he can remember what the thread was called.
A few years ago I had a small dagger stopped in Germany and returned to the US, although the end address was Switzerland, and someone whom I heard about, he is living in Germany, got a dagger with an ivory hilt, confiscated – as the CITE certificate was missing – he was not even allowed to give it to a museum. So do read Mark’s
CITES - An Informal Guide.
It is a big problem for collectors and for dealers, so try to do the utmost to check how to do it best - before sending the weapons.