# Check washing https://youtu.be/6au2YS68Dgw?si=NrhtXLXa4ZJwxza4 - They use special chemicals and avoid signature but change other numbers - This is essentially a mail theft attack - 2022 up to 360k from 96k in 2014 with check washing - 1 billion from FTC a year recovered from stolen checks - They steal from public mailboxes in front of post offices