Dear Mr. Jackson,
I have a Mr. James who applied for the post of Safety Officer in my company. In his application, he lists your name as a reference and says he is currently employed in a similar capacity in your company. He further says that he has held the post for four years.
Could you please verify his claims and also give me some idea of his character, ability, efficiency and any other relevant information. Be assured that anything that you say will be held in strictest confidence. Your cooperation in this matter is much appreciated. Thank you.