What are your company policies that are "written in blood"?

[Michael Myers]

Hey everyone, I'm wondering what your Buy & Hold, BRRRR, and Flipping company policies are. Do you have specific ones that you've had to learn the hard way, aka that are "written in blood"? In Jay's Book on Negotiating Real Estate, he mentions referencing a company policy during a negotiation that states the company must take possession of the property at closing (no lease-back), which seems fairly straight forward, but definitely could have caused some headaches if it wasn't followed. So I am interested to hear what other policies you have cemented into your businesses, and whether a specific situation brought them about, or if they are just general good practice.