Workplace Rant....What to do?? Kinda Long...Sorry

Your boss may tell you to do something that is not correct and when it is found out that you were the one that did it he may hang you out to dry. I have had his happen to me and I almost lost my job because the guy is a rat Bas*@rd lier. Not sure if you can do this but if he does tell you o do something that you know is wrong, get him to put it in writing, in other words, cover your ***. oh ya, keep the recording in a safe place