GREEN CERTIFICATION SLIP-UPS: ANYONE ELSE BEEN THERE?

So, um, my company recently went through the whole green certification process, and honestly, it was way more complicated than we expected. We thought we had everything covered, but turns out we overlooked some pretty basic stuff - like documentation details and certain material sourcing requirements. Kinda embarrassing, you know? Has anyone else run into unexpected hiccups or oversights when trying to get certified? Would love some tips or stories so we don't mess up again next year...