SEO Sai Gr. Hosp.
207984 Points
Joined July 2016
First of all she should have updated her status with all the agencies including Bank/s as Foreign citizen/ NRI as the case may be.
As per RBI regulations she can withdraw/transfer upto 1 million USD per financial year.
More details at: https://www.rbi.org.in/scriptts/FAQView.aspx?Id=23
For general formalities a bank letter is attached