Letter to consulate requesting Visa for Parents, relatives or friend you are sponsoring. This letter must be prepared and signed by the sponsor, and presented to the consulate or embassy by the applicant at the time of the visitor visa interview.
You can also download the MS-Word Format of this letter to US consulate here.
[Date of visa interview]
[Your Full Name]
(Work): (xxx) xxx-xxxx
(Home): (xxx) xxx-xxxx
E-mail: [email address]
To: The US Consulate General, [New Delhi, India]
Subject: Request for tourist visa for parents
I am [Name], working as a [Job Title] for [Company Name], located at [Company Address], USA. My annual gross income is $[Annual Income]. I would like to invite my [parents/relatives/friend] Mr and Mrs [Name], residing at [Visitor's Address], India, to visit us in USA for  months, starting from [Month] [Year].
The purpose of their visit is social as well as tourism within USA. During [their/her/his] visit, [they/she/he] will stay with us at the above address, and I will bear all [their/her/his] expenses including the round trip air fare to USA, food, housing, travel within USA, medical insurance and all other personal expenses [they/she/he] may incur.
I will make sure that they leave United States before the expiration of their authorized stay. I request you to grant [them/her/him] a tourist visa for USA.
Please do not hesitate to contact me via telephone or e-mail if you have any questions.
[Sponsor's full name]