I own a small promotions and marketing agency and we have a huge staff turnover, which means that I am constantly interviewing potential staff memebers. I have recently had two applicants who work for two of my major competitors. One of the things we pride ourselves on is the fact that we have strict confidentiality standards, to the point that - in some cases - if a staff memeber is doing a job and someone asks who they work for they are to say they represent the product and not to mention us. I have decided not to employ these two girls on the basis that they work for our competitors and it may put our confidentiality at jeopardy. Can I be honest and tell them that that is the reason that they didn't get the job? I try to be as honest as I can when it comes to telling people why they didn't get the job, what are things we shouldn't say to applicants that didn't get the job?