Originally Posted by
Stripe
I'm at some distant station and there is some question about my status
That's where I am too. While I haven't had any issue, I was flashing my card to quickly gain access to a JAL F check-in line at SIN last month. Would declaring, "I'm oneworld Emerald!" be sufficient? Perhaps, but showing an elite status card is certainly a much more graceful way of showing your status if there is any ambiguity or question.