(Sender’s details)
____________
____________
____________
Date: __/__/____ (Date)
(Receiver’s details)
____________
____________
____________
Subject: Approval of research
Dear Sir/madam
This is with reference to your letter dated __/__/____ (Date) regarding approval for research. I am glad to announce that you have been granted permission to research the topic of ________ (mention topic).
As a ________ (graduate/masters/scholar/any other) student, we have high hopes from you. We noticed that your dream of studying ________ (mention topic with details). This research will provide you with interesting facts and we hope you continue doing research using ____________ (surveys/questionnaire/any other) method.
Your efforts are appreciated. We are happy to cooperate with you and we wish you luck and success in the future. Kindly contact me on _______________ for any further questions.
Thank you
Sincerely,
___________
letterskadmin 
Rahul Sharma