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. Com or ask your property manager about Leap.Learn the essential steps on how to add a cosigner to a lease to strengthen your rental agreement. Signer is a thirdparty person who signs a lease agreement along with the applicant, but they generally won't live on the property. As a co-signer, you don't have to live in the apartment but your name will be on the lease and you'll be legally obligated to follow the terms of the lease. It depends on the exact wording in the contract. If your father signed as a "continuing guarantor" he would still be liable after renewal. Best way to write up this lease contract is to write it to the co-signer as the tenant with the renter being a permitted long term guest. In addition to this rental application, you will also be required to provide a copy of a valid form of identification and proof of income. Adding a cosigner is pretty straightforward with these steps: Do your research: Treat the apartment cosigner as an additional tenant.