This affidavit form is used to partially waive or release a lien, right to claim of lien or claim on any bond for labor, material, or services provided in consideration of payment made by the party receiving the services.
While they aren't always legally required, using these documents is a smart move to protect your interests and keep everything above board in any construction deal.
If you skip getting a Lien Waiver, you might be left with a surprise lien on your property later, which could come back to bite you during future transactions.
Typically, the contractor, subcontractor, and sometimes the property owner will need to sign these documents to make everything official and binding.