When an invitation to bid is issued, your firm would be contacted electronically. Prospective vendors are also welcome to visit our procurement department.Your bid proposal should clearly express your interest in and highlight your suitability to the project you are bidding on. Request for Quotes; Request for Proposals; Invitation to Bid; Bid Results; Public Notices. It can be hard to stand out from the crowd, but follow these tips to write an attentiongrabbing bid.