The process to doing business with San Bernardino County begins with registering with the online procurement system (ePro). You can register at epro.sbcounty.The City of San Bernardino currently uses PlanetBids. These documents spell out the rules and requirements for vendors competing for a specific contract. Pre-packaged Food Vendors are required to provide proof of San Bernardino County TFF permit that matches the contract name. Vendor Guide to Quote. Pre-qualification applications for formally bid contracts require submission of a questionnaire, supporting documents, and financial statements.