Need to provide proof of employment status? Use this sample employment verification letter to create your own.We must have an accurate record of your employee's work schedule and employment income. Please complete the information on the back of this page. Be sure to include a formal salutation and closing. Description: Use this instruction sheet, employer certification letter template, and cover page when requesting a nonresident Wage Tax refund. The Wage Tax must be filed quarterly and paid on a schedule that corresponds with how much money is withheld from employees' paychecks. Learn how to write a proof of income letter with our stepbystep guide and use our fillintheblanks template as an example. 1. Enter the current date. Edit, sign, and share letter confirmation employee sample online.