I realised yesterday that I made a mistake at work last week. No one else has noticed it yet and there’s probably about a 50% chance that it will be spotted, which will reduce with time. Would you fess up now or just sit tight and hope it’s never discovered? It’s not a major error but it was careless and shouldn’t have happened. My inclination is to say something but I’m worried it will put a black mark against my name. Please help!