I once got all my end of the year tax statements from my employer, with everything printed one line up, which is not big deal, you can see the numbers above on every box, some are printed out of boxes entirely, along with my etc..
This caused an audit and they tried to collect 20,000 from me, with countless hours on the phone, explaining what happened and them not able to understand.
Then I get it fixed only to get it again 2 more times for the same thing. After they fixed it another person flagged it as wrong. Each time it was a different amount owed.