A claim against a property for money owing. A lien may be filed by a supplier or a subcontractor who has provided labour or materials but has not been paid. A lien must be properly filed by a claimant. It has a limited life, prescribed by statutes that vary from province to province. If the lien holder takes action within the prescribed time, the homeowner may be obliged to pay the amount claimed by the lien holder. Alternatively, the lien holder may force a sale of the property to pay off the debt.