When an invitation to bid is issued, your firm would be contacted electronically. Prospective vendors are also welcome to visit our procurement department.Solicitations and Contracts. Learn about current bid and contract opportunities available to consultants, service providers, contractors, vendors, or suppliers. Adjusting documents with our feature-rich and intuitive PDF editor is easy. An Informal Solicitation is a procurement accomplished without an invitation for bids, request for proposal, or request for expressions of interest. CONTRACT DOCUMENTS Unless otherwise noted, the general conditions of this bid, the Contractor's bid, and the signed purchase order form the contract.