I resigned under bad terms with a past supervisor when I did not receive a promised promotion and raise. To make matters worse, 2 fellow employees followed me to my new employer. Now, years later, applications are asking me for the names and numbers of past supervisors. The positions I am applying for are professional level positions. I feel that it is wrong for future employers to speak to anyone but HR. Thoughts on how to handle this situation? Are there any laws dealing with this? Thanks.