How To Write A Letter To Your Bosses Boss . It was dreadful to hear of your bosses death. The style and tone you use will depend on your relationship with your boss, whether it’s professional and formal, informal and chatty, or somewhere in between. Sample Thank You Letter to Boss 11+ Free Documents Download in Word from www.sampletemplates.com Complaint letter to the boss template After your opening, a great way to begin your message is to remind your boss of your. This is short of what you and fellow workers at (company name) expect from me.