Generally a job offer letter will show your new salary and that will help that you will be financially able to pay rent. Filling out a rental application accurately and professionally is one way to make a positive first impression with a landlord.Our Employment Offer Letter template helps you easily create a letter for the next employee you hire. Your landlord may ask for an income verification letter or proof of income letter. Here's how to write that letter of employment for renting. This guide will cover how to write a cover letter for a rental application and even provide you with a rent letter example to help you get started. "Renters can provide a signed offer letter showing their salary if they haven't started a new job yet," says Tiburtini. The most common proof of income is your pay stub or an offer letter from an employer, selfemployed people have access to alternative proofs of income. This can come in the form of a check, pay stubs, tax return, or offer letter if you haven't started a new job yet. 6. Personal References.