SBA Lenders may use this form. Our office provides help with SBA services including funding programs, counseling, federal contracting certifications, and disaster recovery.To complete the application, please place your cursor in the field you wish to complete, enter your information then tab to the next field. A guarantor agreement is an agreement of a third party to provide assurance of payment in the event the party involved in the transaction defaults. What Is a Guarantor? In the context of business loans, a guarantor is a person who agrees to repay the loan if the business is unable to do so. San Antonio, Texas 78201. San Antonio: 210-525-0100. Rent deposit free with Leap. Get qualified today with Leap as your Guarantor.