All vendors submitting bids and offers on Illinois public contracts must: 1. Be a legal entity authorized to transact business or conduct affairs in Illinois.The complete bid or proposal must be submitted to the Department of Procurement Services before the date and time specified. For questions about our bid process, please contact the City's Purchasing Department at . The City of Elgin requires submissions for all bids, request for proposals (RFPs), and quotes. Please click on the links below to view current opportunities. A Request for Proposal (RFP) is the appropriate competitive selection process for purchasing goods or services when price is not the most important criteria. No proposal will be accepted via paper or email.