Nested Case Condition

CASE

                                         WHEN(P.PropertyId=115)    

                                         THEN

                                         ''

                                         ELSE

                                           CASE

                                              WHEN R.CompanyId is not null and R.CompanyId>0

                                                THEN CASE WHEN R.IsSeleComContForConfi = 1

                                                       THEN

                                                       AA.Pincode

                                                       ELSE

                                                       A.Pincode

                                                       END

                                                ELSE

                                                       A1.Pincode

                                            END   

                                    END AS  [Pincode]