missing one shellfish

I’ve lost my oystercard.

Well, actually, I haven’t quite lost it – I know its in my wallet, but i can’t find it in my wallet. How do i know its in my wallet if i can’t find it? Well, it still works. I rub my wallet on the readers at the tube gates, and it lets me in. I rub my wallet on the kiosks to add money to it and it works.

It is most definately in there. But I can’t find it.
*shrugs*

If it aint broke…