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.The purpose of this Administrative Instruction is to establish and clarify procedures regarding. This letter confirms the amount of increase and the company's appreciation for a job well done. Shall receive an equity salary increase to match their salary to the Maintenance Worker I. (2510) salary. Service credit is measured in years. In general, you earn a year of service credit for each year you work full-time in an ACERA-covered job. We do merit increase letters. Send them to the employee via email and stick in the payroll file for audit trail. See Position Description. Location.