How Do You Handle a Job Title Change Without Promotion but With a Pay Raise?

Please note roles and responsibilities will remain the same. The changed designation will be at the same hierarchy.

To Mr. XYZ,

Sub: Designation Change

Dear Mr. XYZ,

With reference to your performance in the last year/month, management is pleased to appreciate your performance. As a token of appreciation, we want to change your designation to "................." with effect from (date).

All other terms and conditions of your erstwhile appointment letter will remain the same.

Wishing you all the best to perform even better.

Authorized Signatory