Rahul, just to be clear you are asking about the JOB OFFER LETTER for the extra 50 points, not the LETTER OF REFERENCE, is that correct? (They are two different letters).
Does your Letter of Reference contain the job duties and responsibilities? If so, and you are continuing in the same position and the job offer letter states that, it may be OK, as long as the job duties and responsibilities are described in the reference letter.