We do send our candidates an appointment letter via email once they have successfully completed all the rounds. An appointment letter is essentially a written confirmation about the job. Our appointment letters are provided before the candidates join us, serving as proof that they have been invited to join our team.
However, the appointment letter does not include details regarding the salary structure, which is specified in the offer letter. The offer letter is given to the candidate on their first day at our company. This practice somewhat deters individuals from accepting offer letters from us and seeking counter offers from our competitors.
I personally believe that the two letters cannot be combined into one, as they serve distinct purposes.
Hope this helps (although late) :)
Regards,
Trupti