When an invitation to bid is issued, your firm would be contacted electronically. Prospective vendors are also welcome to visit our procurement department.Each Bidder shall complete all the blank spaces on the Bid Form. c. Sample Contract: The Bid Document may contain a sample contract document. Bidder is required to use the County bid form. ALL Spaces of the Bid Document shall be filled in clearly. 6. Samples are required in the exact packaging and size as stated in the item description unless otherwise indicated in the bid.