Unlike a conventional appraisal, an FHA appraisal belongs to and remains with the subject property for 6 months. Therefore, if you have a buyer that pays for an FHA appraisal and a mortgage broker sends the borrower to a bank that subsequently declines the loan the broker can simply have that appraisal's FHA case number reassigned to a new lender and they must accept it. However, once the original loan that the appraisal was ordered for closes, the appraisals shelf life is over, even if less then 6 months has transpired. Since the original borrower, who the appraisal was ordered for, closed on their loan a new appraisal would be required in this situation. Hopefully this helps you understand the rule a little better.