Ga. Code § 34-9-81
The written notice provided for in Code Section 34-9-80 shall state in ordinary language the name and address of the employee, the time, place, nature, and cause of the accident and of the resulting injury or death and shall be signed by the employee or by a person in his behalf or, in the event of his death, by any one or more of his dependents or by a person in their behalf. No defect or inaccuracy in the notice shall be a bar to compensation unless the employer shall prove that his interest was prejudiced thereby, and then only to the extent of the prejudice. Such notice shall be given personally to the employer, or his agent, representative, or foreman, or to the immediate superior of the injured employee or may be sent by registered or certified mail or statutory overnight delivery addressed to the employer at his last known residence or place of business.
OCGA § 34-9-81