OpSec is Operations Security. This shows what not to do.


I was walking on Denny getting in a bit of a walk over lunch when I looked down, and I saw a check sitting on the ground. I picked it up, and when I got back to the office, I gave Matthew a call to see what he wanted me to do with it. It turns out that he wrote this to his daughter and she used one of them new-fangled take-a-picture-with-your-phone style of deposit.

The problem is that you should then go and destroy the check once you’re done with it.

As you can tell by how much I’ve blacked out, there is a lot of personal information on here. This is not something you want the world to know about.

  • Name (and in this case, partner’s name)
  • Address
  • Phone number
  • Checking account number
  • Current check number
  • Signature

This check also had Katie’s signature on the back as well.

I didn’t block the routing number since that’s public.

People, be careful out there! This information is just about enough for me to open up a credit card or some other stuff that may be even worse like simply drain your account with some random EFTs. If nothing else I can social engineer the shit out of you.

Don’t do this! Let the people you give checks to know as well, this would be a bad way to lose a lot of money really quickly!