Generally a job offer letter will show your new salary and that will help that you will be financially able to pay rent. You need a letter of employment to get an apartment so that you can prove to the landlord that you are employed.Landlords require employment verification letter for apartments as this document helps them understand your ability to pay rent every month. Applying for an apartment? A short letter from your manager outlining your job title, salary, and how long you've been there will really help strengthen your application. Another important NYC rental requirement is having proof of employment. Most New York landlords will not rent you an apartment without a job letter on a company letterhead stating the length of employment and salary. It's essential that before you start your search for your rental apartment, you have a hard copy of your job letter. You may include your yearly salary. It will be a part of your REBNY submit offer form, so you will be conveying this information anyway.