Not an Easy Target · Newsletter 2 · October 7, 2026
Your bank will eventually notice that someone else is spending your money. The whole question is whether eventually arrives before or after the money is gone. Most people find out the same way: at the end of the month, reading a statement, staring at a charge they cannot place. By then the card has been tested with something small, used for something large, and quietly sold on. Every one of those steps had a moment where a five-second notification would have ended it. Banks do run fraud detection, and it is genuinely good at catching the obvious. It is not good at catching the careful. Someone who spends the way you spend, in the kinds of places you shop, in the amounts you normally spend, does not look like fraud to an algorithm. They look like you. You are the only person alive who knows they are not. That is the entire idea behind a transaction alert. You are not asking your bank to get smarter. You are asking it to tell you every single time, and letting your own memory do the detecting. You know instantly whether you were in that store. No algorithm ever will. | ||||||||||||||||
The first week feels noisy. Then it fades into the background, and one ordinary afternoon a notification arrives for a purchase you did not make, and you kill that card while the criminal is still standing at the terminal. |
You are turning on card purchase alerts. Which threshold should you pick?