In current practice, a lis pendens is a written notice that a lawsuit has been filed concerning real estate, involving either the title to the property or a claimed ownership interest in it. The notice is usually filed in the county land records office. Recording a lis pendens against a piece of property alerts a potential purchaser or lender that the property’s title is in question, which makes the property less attractive to a buyer or lender. After the notice is filed, anyone who nevertheless purchases the land or property described in the notice takes subject to the ultimate decision of the lawsuit.
The recording office will record a lis pendens upon request of anyone who claims to be entitled to do so (e.g. because he has filed a lawsuit). If someone else with an interest in the property (e.g. the owner) believes the lis pendens is not proper, he can then file suit to have it expunged.
Some states’ lis pendens statutes require the filer of the notice, in the event of a challenge to the notice, to establish that it has probably cause or a good likelihood of success on the merits of its case in the underlying lawsuit; other statutes do not have such a requirement.
The effect of this rule, and especially its effect on purchasers led many jurisdictions to enact lis pendens statutes requiring a written notice, usually recorded in the land records where the real estate is located, for the notice provisions of the rule to be effective. Typically, a separate recorded instrument is required by statute if the lawsuit in question affects title to real property. If the statutory requirements are met, the world is put on "constructive notice" of the existence of the suit, and any person acquiring an interest later does so subject to the outcome of the suit.
Lis pendens is taken as constructive notice of the pending lawsuit, and it serves to place a cloud on the title of the property in question until the suit is resolved and the notice released or the lis pendens is expunged. Reputable, careful lenders will not lend money on the security of land which is subject to a lis pendens, as title insurance companies will not insure the title to such land: title is taken subject to the outcome of the lawsuit.
It is important to note that the presence of a lis pendens does not prevent or necessarily invalidate a transfer of the property, although it makes such a transfer subject to the outcome of the litigation. As such, it tends to scare off diligent, reputable lenders and careful buyers. Once the lis pendens is recorded, the recipient (a "purchaser" or "grantee pendente lite") would be deemed to have notice of the litigation, and thus would not be a bona fide purchaser, and the title might be regained.