Important information that should be in an internship offer letter. Know the Offer: Review the job description and the entire offer package.It is OK to reach out to ask for clarification about the role and the offer. Here's a customizable internship offer letter template to help you get started. Subject: Your internship offer details. We offer internships across our organization, from your local hospital to our corporate offices. Ready to dig into what you're passionate about? Internship for current students in good standing at an accredited education.