As posted on the FHA Connections FAQ:
"Q5: When I submit the "Appraisal Logging" page, I receive an error that says, "DATE APPRAISED MUST BE ON/AFTER DATE ASSIGNED TO APPRAISER". What is causing this error to occur?
A5: As the error indicates, the date entered for the Date Appraised field is a date prior to the date that was entered for the appraiser Assignment Date field when the case number was ordered. Usually this occurs because the person who orders the case entered the date on which they ordered the case in the Assignment Date field instead of the date the appraiser was contacted to request that they complete an appraisal for the property. Please go to the "Update Existing Case" page to correct the Assignment Date field in the Appraiser Fields section. "
In my experience if they cannot supply me with the case# prior to inspection of the subject there is no guarantee that the borrower qualifies for FHA financing, I am the assigned appraiser, and/or the client is possibly shopping around for the number hitter. However, I believe it is the appraiser's business decision to inspect or not prior to receiving the case#. I once inspected a house as FHA prior to receiving the case#, prepared the FHA appraisal report, and afterwards the borrower was determined to not qualify for FHA financing (or so the client claimed). They tried to pull the "reduced to trip fee" nonsense. I no longer work for this client and have made the business decision to not inspect a subject until the case# is assigned.