Probate after 23 years

You need to open your father's estate for probate (if he had a Will) or administration (if he did not have a Will). Your statement that there was no need to probate after his death is apparently incorrect, as there was a Fidelity account that he owned and that had no beneficiary designation on it. That account became part of his probate estate at his death, and without a probate or an estate administration that account stayed in his estate. If you are the sole heir, and if there were no creditors at his death (or if all of any such creditors have been fully paid before now), and if he had no Will, then you might also be able to do a Petition for No Administration Necessary, instead of a full administration. But you may not be able to get the needed information for that Petition without an estate representative who is able to get that information from the Georgia Treasury Department. Hire an experienced probate attorney to help you with this. Best wishes to you.