As an employee, you can send a salary increment letter as a formal request to increase your pay. It outlines your achievements and contributions to the company.This letter confirms the amount of increase and the company's appreciation for a job well done. Need to write a salary increase letter to an employee? Follow these step-by-step instructions to write your own, or steal one of our pre-made templates. Write this to your boss. "Dear Boss, I've been working here for 6 months. Learn how to write a salary verification letter and review a template, examples and tips to help you get started on writing your own. There may come a time when an employee needs a proof of income letter to secure a loan or rent an apartment. Here's a template and what you should include.