Lease Cosigners, AKA Guarantors: Frequently Asked Questions Add this addition to the standard lease agreement to legally transfer the terms of the lease agreement to a co-signer without a resident. Add a co-signer agreement to your lease or lease to prove that a co-signer has agreed to take financial responsibility if the tenant is unable to make payments. As a tenant with an unstable job or poor credit history, a co-signer agreement shows your landlord that rents are guaranteed. As a landlord, he guarantees that another party rents and covers other costs if the tenant cannot pay. As a co-signer, it defines your legal and financial responsibilities for rent on behalf of a tenant. Your co-signer agreement should contain information such as: Who is the owner; the name(s) of the tenant(s); when the original lease has been signed; the location of the leased property; the name, driver`s licence and social security number of the co-signer; whether the co-signer is responsible for renewals or amendments to the lease agreement; and all other special provisions. Other names for this document: Co-Signer Agreement Form, Lease Co-Signer Agreement Trust of more than 2.3 million owners and managers Whether you are a landlord or tenant, a co-sign agreement is useful in rental situations if there are questions about the tenant`s financial situation. With the Co-Sign Agreement signed by a financially secure third party, the tenant and landlord have a safeguard that agrees to take financial responsibility for the lease if the primary tenant cannot pay for any reason… .