The internship offer letter should include the start and end dates of the internship, as well as the number of working hours per week. We, hereby, make an offer to (student's name).This letter offers an unpaid internship position with a department to a student. Sample internship offer letter template. Employment Offer Letter Instructions. The Internship is: Paid____. (Check all that apply. You can contact the HR Manager through email or phone no. Whichever you is available with you. The Hiring Manager will also need to fill out an intake form.