I have spent my professional life reading numbers upside down and at a glance across conference tables, and in the half-second before the cover closed I read what he had written: four sets of four-digit numbers.

An expiration date.

A three-digit code.

My card details.

All of them.

The full number, the expiry, the CVV — everything a person needs to make my money spend itself anywhere in the world, copied by hand into a notebook so that even a frozen physical card could not stop him.