We are providing a letter template for those who wish to write their own letter to invite family members to the US. For your convenience, we have prepared a template to help you craft your invitation letter.Download the invitation letter template. I am inviting my mother, brother, aunt, friend, etc. I am writing to ask whether you would be willing to present a talk at the conference as an invited speaker. Invited talks will be one hour long. An invitation letter from you detailing the dates of the intended visit and a summary of the activities to take place during the visit. You should fill out a separate invitation letter for each person you are inviting. The invitation letter must be in the English language, so that US officials can read it. Complete the Invitation Letter form.