A Showing of a "Real Property Claim" is Mandatory. A lis pendens is not a mechanics lien, but it is often required as part of the lien process.Remember that a lis pendens is a notice of a pending lawsuit. Time when notice of lis pendens may be filed. First, a lawsuit must be filed with the county clerk, and the suit must be pending. A Lis Pendens is a type of written notice indicating that a lawsuit has been filed concerning a particular piece of real estate. A lis pendens is a notice of pending litigation. It constitutes constructive notice of any claims in the suit as to the land. The notice of the pendency of the action shall constitute notice for only five years from the date of the filing of such notice. What is a Lis Pendens?