The suretyship for the construction contract was not discharged at tender letter, occupancy, or final completion nof the structure, but by the final payments to the completion contractor; the obligee therefore held the superior interest to the assets of the defaulting party, and could waive its claim to the defaulting party's tax refund.
Settlement order explicitly referencing the tax refund and holding that nothing in the settlement could limit any interest of the surety in the refund preserved no interest, as the suretyship had not acquired its priority interest prior to the settlement agreement.
https://www2.ca3.uscourts.gov/opinarch/203057p.pdf