Which document would provide a record of the work commencing and completion for a mechanics' lien?

The document that provides a record of the work commencing and completion for a mechanics' lien is the complaint for mechanics' lien. This complaint is a legal document filed by a contractor or subcontractor who has not been paid for work performed on a property. It establishes the contractor's claim against the property due to non-payment and typically includes details about the nature of the work completed, the parties involved, and the dates of commencement and completion of the work.

By filing the complaint for mechanics' lien, the contractor effectively creates a public record of their claim, which is essential for enforcing their rights to payment through the lien process. This documentation is crucial in the mechanics' lien context because it demonstrates the work performed and supports the validity of the lien.

In contrast, a general contractor's agreement mainly outlines the terms between the contractor and the owner, which may not detail the specific commencement and completion dates. A contractor's license serves as proof of qualifications and permission to work but does not relate to specific projects or timelines for completion. Property tax records are related to the ownership and valuation of the property, rather than the specifics of construction work or payment claims.