Hello,
I am planning to visit my sister staying in USA. I have applied for B2 visa. I have some doubts regarding who can sponsor my trip. My father, who is with me in India is willing to sponsor my trip.
Can my father sponsor my visit, if no why?
What are the documents which will be required from my father?
Should my sister mention in the invitation letter that our father is sponsoring my trip?
Can you please let me know as soon as possible.
Yes, your father in India can sponsor your trip for visiting your sister in USA.
The invitation letter should clearly mention who’s sponsoring the trip and your sibling in US can mention your father’s name.
Remember that you will need to prove that you will come back to India.
The immigration office should not get the impression that you are going to ‘Not return’.
Your father can show his income tax returns, bank statement and any property papers (that he owns) to prove that he has the money to sponsor you for the time you will be in US.
Read details here:
https://www.truvisa.com/t/apply-visitor-visa-b1-b2-for-family-relative-or-friend-document-list/191?u=anil_gupta
Thank you for the information 
!