To whom it may concern,
(your name) is currently employed by (name of company) as a (name of your job) . Riya has been working with us since her original hire date of (date you started) . Her position is secure, and we look forward to her continuing employment.
Her weekly/ monthly salary is __________________ . (If there are bonus arrangements, or any additional income from the company, try to explain it and we can take a look. If you work on an hourly basis, try to explain the rate and the number of hours, and any overtime arrangements, etc.)
(your boss' name and title)
(signature)
It might be a good idea to have someone from the country where your bank is located take a look at this, in case there are some cultural differences. - A.