California Construction — Advertisement for Bids is a document used to solicit bids from contractors in California for construction projects. It is usually issued by a public or private entity, such as a municipality, school district, or private firm. The advertisement includes the scope of work, estimated cost, and requirements for submitting a bid. There are two main types of California Construction — Advertisement for Bids: Invitation for Bids (IF) and Request for Proposals (RFP). An IF is used for projects that are clearly defined in terms of scope and requirements. An RFP is used when the project is more complex and requires further negotiation between the contractor and the entity issuing the advertisement.