Bids are generally submitted in the county's electronic bidding system, Supplier Portal. Find information about contracting with Hennepin County, including processes, forms, and diversity rules for goods and biddable services.The Bidding Requirements consist of the Invitation to Bid, Instructions to Bidders,. Bidder must provide one (1) copy of the Proposal form. Bidder must only submit bid information in the designated areas of the Proposal form. To help you make your request, you can use our sample request form (PDF) View. 2. The sheriff's office will inform you of the redemption amount. Contractors must fill out the ATP-2 Form and submit NYSDOL. Bidders shall submit bids in duplicate on the forms provided in the Project Manual.