I got a verbal job offer today. They asked that I start on Monday/Tuesday. It's Friday now. They said the written job offer will be coming over.
If they want me to start that soon, should I tell my current boss now or wait until I get the written offer?
I know the person who offered the job and interviewed with. We both used to work together at the same company I'm at now (i'm paid out by invoice instead of a full time employee).