All bidders are asked to fully complete the form and to provide the necessary certifications. Here are some simple things you need to know about the bidding process.Bidders must complete and submit a signed original of each and the applicable number of copies of each with their Bid. 15. (Complete this form if your bid is over (250,000.00). (See Section No. 18 Information for Bidders). 1. a. Bidders must complete the attached TOWN OF RIVERHEAD forms, which include. Information Sheet and Vendor Reference Sheet. Please complete the bidder section on this sheet even if you choose not to bid.