[quote:92dfccc139="skybluearmy"]Nattydread, PSS say in there brochure that there estimate covers the following
" Marking, numbering and [b:92dfccc139]listing of all packages[/b:92dfccc139] for customs requirements"[/quote:92dfccc139]

I think this means they draw up a list of box numbers and a rough idea of what's in them for customs and for their own information, so they can keep a check on the boxes. The full list of what's in each box is usually done by the person filling that box, as they would be the ones that put the stuff in. So, if you fill any box yourself, you would have to draw up the list of contents, at least that's what happened with us.