I worked in a small company. There were two boss (One is 'X', the other one is 'Y') who were in charge of my duties, but I did not have a good relationship with 'X'. I left the company and start to look for job. I use broadcast letters to approach companies that may need my experience and background. Since I put the name of my last company on my resume, people may call the company. If a potential employer looks for who was in charge my work duties, I guess the receptionist would re-direct the call to 'X'. Therefore I want to know should I put 'Y' contact information directly on my resume in case a potential employer wants to talk to someone in my previous company?