Requiring fees from applicants

Q. We have a problem with applicants who pass the pre-hiring process but then decide for some reason that they don’t want the job after all. By the time we learn this, we have already spent time and money on drug tests and orientation, and turned down other applicants. Can we require applicants to submit fees to apply, which we will refund if we don’t hire them, or if they remain employed for a minimum period of time? ...