We have provided a sample invitation letter for inviting relatives and friends above. You may fill out the highlighted sections using your own information.Full name and nationality of the applicant. The form must be dated and signed in front of a Visa Officer. 2. Recent passport-size photograph: (1.2"x1.5" or 3x4 cm), on white background, full face and. There is no requirement for an invitation letter. If you want to send on send it to your parents who in turn may present it to the US consulate. Describe the visit in detail. Include the invitee's full name, passport number, and date of birth. So I got my residence permit and invitation letter in the mail yesterday and now I need to get it converted to a Z Visa.