Lenders routinely require a small business owner to sign a personal guaranty as a condition for a commercial loan to the business entity. To mitigate this risk, landlords now routinely require either a personal or corporate guaranty to secure a tenant's obligations under the lease.The Ez Landlord Forms Personal Guarantee provides added security and assurance for the commercial landlord. The personal guarantee allows a landlord to use your personal assets to cover costs if you fail to pay rent, maintenance fees, or other related expenses. A personal guarantee commercial lease is a legally abiding contract that makes a business owner assume personal liability for responsibilities and obligations. Personal Guarantee for a Lease Agreement (Co-Signer). North Carolina Commercial Lease Agreement. The personal guarantee likely binds you to personally pay the rental obligation, i.e. , the contract amount. There is no such thing as an oral guarantee in North Carolina.