Executive Interview Invitation Letter. The letter should include specific details like your relationship with the visitor, the purpose of their visit, duration of stay, and financial arrangements.So, you can simply send out an email with a subject that specifically mentions the "interview", such as "Interview Request _ Company's name". By completing this card, you will receive an email when the County begins accepting applications for the job. Letter of Invitation to Interview - Free download as Word Doc (. Your invitation letter should list the purpose of the visit, i.e. To attend your Commencement, visit family, etc.