Guarantor: Gross monthly income must meet or exceed four times the monthly rent amount. A guarantor is someone who cosigns the lease agreement and is responsible for any rent payments that you cannot or do not make.Even with a guarantor lease, the tenant (the person living there) must both fill out an application. Com or ask your property manager about Leap. Fill out the lease guaranty application online and send us your paperwork. If a guarantor is required, the guarantor must complete an application, and meet all of the qualifying criteria noted above. A second chance to secure your dream home. Helping you qualify for the rental you want, while giving property managers protection against defaults. A valid social security number, ITIN, or proof of permitted stay in the US with a Visa is required for all applicants.