How long does the process of international shipping documents take?

M: Amber, we have to find a suitable place to meet with HA Systems Co. Did your broker say how long it’s going to take to process all the importing documents and customs forms?
W: Yes, Brian.(68)I was told it would take at least 14 days to process the international shipping documents.
M: That sounds good to me. I thought sending documents back and forward to London would take three weeks or so. Are you planning to go to the meeting by yourself?
W: Actually,(70)Melissa will be there,(69)so I can be working in the comfort of the main office here in Seattle.