To create an internship offer letter, include key details, next steps, legal terms, and close with a signature section. This letter serves as a pivotal tool in commencing your new role with confidence, setting forth clear expectations, and offering reassurance to the company.Below you'll find the best email template for accepting an internship – just fill in the blanks for yourself. Internship Acceptance Letter - Free download as Word Doc (. I am writing to express my gratitude for the opportunity to intern at your esteemed company. I am thrilled and honored to accept the offer to join your team. Additionally, I shall complete all employment and insurance forms for the new employee orientation. I look forward to working with you and your fine team. I,. , accept the offer within this agreement and will take part in the internship as stated above. Signature of Intern.