The instrument may also be filed in the probate court of the county in which proceedings concerning the transferor's estate are pending or in which they could be commenced and, in the case of real property, in the real property records of the county in which the real property is located. An instrument so filed in the probate court shall be conclusively presumed to have been received by the personal representative of the transferor's estate not later than the date of such filing, but earlier receipt may be shown.
OCGA § 53-1-20