Our MLS Listing Help service makes listing your property for sale or rent a breeze. California requires those selling FSBO to fill out and file many documents and forms.Several of these documents are legally binding agreements. You'll need to fill out a seller disclosure form and a Residential Contract for Sale and Purchase. This FSBO paperwork is needed as soon as you accept an offer, so it's useful to have a purchase agreement onhand that you can fill out quickly. Forms are state specific because real estate laws vary significantly from state to state. Flat Fee MLS Listing Riverside California. Download an affidavit form. Interested bidders may review, print, and complete a copy of the affidavit. Use the SEARCH BAR above to find your form more quickly.