A Request for Proposals (RFP) from the Minnesota Department of Commerce is a formal invitation to potential contractors or grantees to submit a proposal. All bids must be submitted electronically via Bid Express.A Request for Proposal (RFP) is a formal invitation to potential contractors or grantees to submit a proposal. Here are some of the forms you may encounter: Bid bond. In order to submit a bid for a transportation project on One Office, potential bidders will need to follow the below steps. Sign up or login with ConneX. Interested parties must create a Bids and Tenders account in order to submit proposal documents. Documents are not provided or received in any other manner.