Use this free guarantor form template to create guarantor forms for rent, lease, loans, employment, students, personal reasons, work and so much more. You can use this guarantor agreement form template as a base and start creating your own form in less than a minute.Get started right now! Look at "guarantor" as a co-signer for a loan. A guarantor form is a document that certifies a guarantor's decision to assume liability if a particular individual does not fulfill the terms of an agreement. Create a guarantor agreement for your next lease or loan agreement. No coding knowledge needed.