Iran-held Brits

All these letters being bandied around with their suspect stilted language ... I assume these capturees are shoving in clues that they are being coerced, not that they need even do that.

All the people I know who've been held and made to write messages to loved ones or the authorities have simply included wrong nicknames, unlikely vocab, etc.

Of course, they have to count on the recipients going on global media to proclaim "Hoorah! Good news, chaps - it's all fake because that's not my nickname at all and he would *never* use "prithee" in a message to his Gran." Meanwhile, over in the bunker, the captors leap up from admiring their blanket media coverage to duff the wily scribe over.