For most commercial construction contractors and subcontractors, non-payment on a job can cripple business. Non-payment usually stems from a dispute between the general contractor (GC) and the subcontractor regarding the quality of the work. Sometimes, the GC refuses to pay the subcontractor despite still being paid by the property owner. Whether the GC actually believes the work is substandard or is just trying to increase his or her profits, you can use the law to put the world on notice that you haven’t been paid through the filing of a lien. If you are a subcontractor, this article details how to lien property and force compensation for the work performed. Please note, the contents of this article only apply to liens involving non-residential construction contracts.