Yep, as long as it states start date and salary you're good. I'm a leasing agent and do this all the time.Applying for an apartment? You can also use an official offer letter as proof of income as long as it includes your salary. Ask your landlord if they would be willing to write a short letter explaining you were a great tenant. Generally a job offer letter will show your new salary and that will help that you will be financially able to pay rent. Mention your name, the type of job you do, and why you're interested in the apartment. The typical rental application process involves several steps and can vary based on the property and management. Below is a quick overview of the process. If you apply to rent a place to live, the landlord may "screen" you.