Each proposal contains all certifications and affidavits, a proposal signature sheet and a proposal bid bond. PREQUALIFICATION. The submission of a Bid shall constitute a representation and warranty that: (i) Bidder has carefully and thoroughly reviewed the Contract.How to Write a Bid Proposal. Crafting a successful bid proposal involves more than filling out a bid request template. Proposals MUST be submitted electronically through the Vendor Bids portal save the document, prior to submitting electronically. Specifications and complete bid documents may be obtained from the Village of Hanover. All contractors are required to complete the following certification.