Important information that should be in an internship offer letter. A sample letter offering a job contingent upon the results of a background check or other criteria.This letter offers an unpaid internship position with a department, providing hours per week from a start date through an end date. The internship offer letter should include the start and end dates of the internship, as well as the number of working hours per week. The process listed below is intended for students interested in completing an internship or co-op from the following colleges. We are pleased to offer you a medical internship position at Greenwood Medical Center for the Internal Medicine department, beginning on June 1, 2050. I am writing to confirm my acceptance of your employment offer on April 20 and to tell you how delighted I am to be joining XYZ Corporation in Chicago. In the formal offer letter, provide comprehensive details about the position, compensation, benefits, and other pertinent terms. Between my inschool experience and my work helping entrepreneurs, I'm confident I can bring fresh new ideas to Example Company as an intern.