If you need to get signed into someone else’s dorm tonight, there’s a pretty good chance you’ll forget to pick up your ID on the way out, then panic a few minutes (or hours, or days) later. So, how do you go about asking for it back from the desk guard? Managing Editor Betsy Ladyzhets has put together a handy flowchart to help you figure that out, based on way too much personal experience.

Every possible ID-forgetting scenario?