In tax sales made under section 446.19, a holder of a special assessment certificate against a parcel, a holder of a bond payable in whole or in part out of a special assessment against a parcel, or a city within which a parcel is situated, which parcel has been sold, is entitled to an assignment of any certificate of tax sale of the parcel, upon tender to the holder or to the county treasurer of the amount to which the holder of the tax sale certificate would be entitled in case of redemption.