This person had a signed job offer, put in their two weeks, worked out their notice, and then the company rescinded the offer 3 days before their start date. Now they're unemployed with rent due. This should be illegal. Here's what almost nobody in that thread knows. In many states, it basically is. The doctrine is called promissory estoppel. A company that makes you a promise it knows will cause you to resign owes you when you resign and get burned. The offer letter alone means little in an…