The landlord requires that I sign a personal guarantee, or provide a 6-month security deposit, to lease the space. Hello, yes any lease over two years needs to be notarized in the state of Washington.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. A personal guarantee commercial lease is a legally abiding contract that makes a business owner assume personal liability for responsibilities and obligations. A commercial lease will provide that if the tenant (the business) fails to pay rent, the landlord may collect against the personal guarantor. Use our step-by-step builder to create a Commercial Real Estate Application. The personal guarantee likely binds you to personally pay the rental obligation, i.e. , the contract amount. A personal guarantee ensures that if your business fails to meet lease obligations—unpaid rent or damage repairs—you're personally liable to cover those costs.