A code that works once and expires in minutes. No real bank or company will ever call and ask you to read it out. Anyone who does is taking your account.
The drawing that proves the sentence above. It is the same card that is in the book.
Think of it as
a movie ticket good for exactly one showing.
For example
A man calls, says he is from your bank, and asks you to read out the six numbers that just arrived. Hang up. Your bank never asks for those.
This is one card out of 275.
The hundred words you meet most are free — the whole set, animated, in one file that works with no internet.
Volume 1 has all 275 in fifteen chapters, with Staying Safe the largest chapter on purpose.