My dad has agreed to cosign a lease with me but I am afraid my application will just be thrown out since I cannot provide a credit score or any proof of income. When asking someone to be a co-signer on an apartment lease, first explain your situation.Counterpart Signature. If you are planning to move with a friend or a co-signer, they will need to fill out a separate apartment application form. Co-Signer is required if you cannot prove that you can afford 3x the monthly rent. Interested individuals submit their rental application through our website after reviewing our application requirements. This guide will provide all the necessary information you need to screen, process, and add a cosigner to a lease. Make a formal application for the rental you are interested in. Once the applicant completes their submission, each person wh. Save yourself some time and check out our Frequently Asked Questions.