Fill out all applicable spaces in the information grid at the top of the front page of the Guarantee. SBA Lenders may use this form.SBA Form 148 (Unconditional Guarantee) and SBA Form 148L (Limited Guarantee) are the standard documents for providing a guaranty on an SBA loan. 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. "Obligee Guarantor" has the meaning specified in Annex E. "Parent"has the meaning specified in the preamble to this Agreement. How to fill out the SBA Form 148 Unconditional Guarantee Guidelines? 1. Gather all necessary loan information. 2.