REQUEST VACATION TIME 2 WEEKS IN ADVANCE, BOSS APPROVES WITH SIGNATURE. BOSS CHANGES MIND AND SAYS I CAN'T GO. I PROVE TO HR THAT THE BOSS SIGNED APPROVAL AND I GO ON VACATION; COME BACK TO NO JOB, BECAUSE I'M FIRED FOR NOT COMING INTO WORK WHEN SCHEDULED. I WAS SCHEDULED BECAUSE ANOTHER WORKER WITH SENIORITY WENT ON VACATION THE SAME TIME I DID.