Unsolicited proposals originate from the private sector. It refers to a project proposal that involves a new concept or technology or a project that is not in the list of priority projects of the LGU. It is not in response to a formal solicitation or request issued by the LGU to undertake infrastructure or development projects. This type of proposal is the perception of the private sector on how it might address a development gap or a prevailing issue in the LGU. To better comprehend the PPP process for unsolicited proposals it is helpful to know the basic concept of a negotiated contract, original proponent, and comparative proposal. A negotiated contract is a contract based either on direct negotiation (based on the process for solicited proposals) or the unsolicited proposal itself. The original proponent - the bidder who submitted a complete proposal for a project which is not included in the list of priority projects but with a potential to introduce a new concept and/or technology that contributes to the achievement of the development agenda of the LGU concerned. A comparative proposal refers to a proposal that is competitive or at par with the unsolicited proposal. A comparative proposal can challenge the project cost of the unsolicited proposal of the original proponent to ensure efficiency.