Download Illinois Employment (Income) Verification Letter template, modify and send for signing using BoloForms Signature. If you work remote, it's important to know what you'll need when applying for a mortgage, and where you can apply for one.An employment verification letter is a document that confirms an employee is currently or was previously employed at a certain company. Mortgage lenders may request a letter to verify your employment. Here's a simple template you can give to your employer to speed things up. Learn how to write a proof of income letter with our stepbystep guide and use our fillintheblanks template as an example. Looking for an employment verification letter? Sometimes, a lender might request an employment letter to prove your income. Here's how you can request one from your employer. Edit, sign, and share sample remote work letter for mortgage online.