I am new in this site and I hope to convey my question in a correct manner.
Any employee is also entitled to receive a reference letter. This document must contain an assessment on the performance of the employee in their post(s).
My question is, should I write "their" or "his/her".
As far as I understand, "their" is used to prevent gender-based discrimination.
In advance, I would like to thank you for your assistance.