Made custom app for company for certain kinds of inspections. Was requested to make a license key for the app that is used internally. This was in case they wanted to franchise the business.

I made zero effort for the code to even protect against a weak attack vector. Like some shitty ass base64 or some shit like that. Any casual could crack it.

Years went by and was not talked about ever again. I took the shitty code I wrote for this out of the app. I can put it back, but guaranteed they will never ask again.