I remember as a young expat engineer, I've worked for one large consulting job doing UK's NHS's NPfIT project in 2005. I've refused to signoff the architecture due to one of the providers not meeting requirements. One year later I've written a 6 point warning to the C-level of the company, that it's going to fail. Then quit the project and left. Years later, I read that the project was a failure for UK. I still keep my warning letter as a badge of honor, showing to my family and friends.

- https://en.wikipedia.org/wiki/NHS_Connecting_for_Health that