https://www.efanniemae.com/sf/guides/ssg/annltrs/pdf/2008/0830.pdf
"Requirement to Provide the Sales Contract to the Appraiser
Selling Guide, Part XI, Chapter 2: Appraisal (or Property Inspection)
Documentation
Fannie Mae requires the lender to ensure that it provides the appraiser with all
appropriate financing data and sales concessions for the subject property that will be, or
have been, granted by anyone associated with the transaction. Typically this information
is contained in the sales contract; however, Fannie Mae currently does not require that the
lender provide the appraiser with the sales contract. Fannie Mae is adding the
requirement that lenders must provide the appraiser with the sales contract and all
addenda, therefore ensuring that the appraiser has been given the opportunity to consider
the financing and sales concessions in the transaction and their effect on value. If the
sales contract is amended during the process, the lender must provide the updated
contract to the appraiser."