Offer Letter Example. The internship offer letter should include the start and end dates of the internship, as well as the number of working hours per week.Free Internship Offer Letter From Company Template - Free download as Word Doc (. Sample internship offer letter template. Follow these step-by-step instructions to create job-offer letters that reduce legal risks. Links to sample letters are included. Download Virginia Employment Offer Letter template, modify and send for signing using BoloForms Signature. In the formal offer letter, provide comprehensive details about the position, compensation, benefits, and other pertinent terms. You can then proceed to congratulate them for being considered for the position. Why is a job search letter called a "cover letter?