GuarantyGuarantyPayment Guaranty, Non-Recourse Guaranty, or other guaranty by a Guarantor for the Mortgage Loan. executed by a Key PrincipalKey PrincipalPerson who controls and/or manages the Borrower or the Property, is critical to the successful operation and management of the Borrower and the Property, and/or may be required to provide a Guaranty. on Form 4501 series or Form 6015 series, or approved by Fannie Mae.