Offshore does not mean off-limits when it comes to obtaining information during litigation. Andrew Bolton explains how to fill in the blanks

Donald Rumsfeld, the former US defence secretary, speaking at a press briefing in 2002, famously said: “As we know, there are known knowns: there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns – the ones we don’t know we don’t know.”