Construction contractors interested in performing construction contracts with the department must first complete the Vendor Registration process. Upon project completion, an itemized final invoice and completed NCP Form are required to be supplied to the municipality from the contractor."Bidder." A person that submits a bid in response to an invitation for bids. A resident Bidder is a person, partnership, or corporation or other business entity authorized to transact business in. The Bidder shall also examine the proposed Contract Documents, including the plans, specifications, the General.