Georgia Code Title 9. Civil Practice § 9-10-11

(1) If it is shown to the satisfaction of the court by the sworn statement of a reputable physician that the principal in the bond was prevented from attending by some physical disability; or

(2) If it is shown to the satisfaction of the court that the principal in the bond was prevented from attending because he was detained in a penal institution in another jurisdiction. A sworn affidavit of the warden or other responsible officer of the penal institution in which the principal is being detained shall be considered adequate proof of the principal's detention.