Which of the following is NOT considered a lien against real property?

An easement appurtenant is not considered a lien against real property because it does not create a financial claim or obligation on the property. Instead, it grants a right to use a portion of the property for a specified purpose, typically benefiting another parcel of land. This means that while an easement can affect the property rights and value, it does not impose a debt or enforce a payment obligation like a lien does.

Liens, such as mortgages, judgments, and tax liens, involve claims that secure payment for debts. Mortgages are loans secured by the property itself; judgment liens arise from court decisions and are against a debtor's property; tax liens are attached for unpaid taxes. Each of these involves an encumbrance that can affect an owner’s ability to sell the property or secure further financing until the obligation is satisfied. Therefore, an easement appurtenant fundamentally differs from these concepts by representing a use right rather than a financial obligation.