Ga. Code § 10-7-24
Any surety, guarantor, or endorser, at any time after the debt on which he or she is liable becomes due, may give notice in writing to the creditor, his or her agent, or any person having possession or control of the obligation, to proceed to collect the debt from the principal or any one of the several principals liable therefor; and, if the creditor or holder refuses or fails to commence an action for the space of three months after such notice (the principal being within the jurisdiction of this state), the endorser, guarantor, or surety giving the notice, as well as all subsequent endorsers and all cosureties, shall be discharged. To comply with the requirements of this Code section, the notice must specifically state that the creditor loses his or her rights to pursue the surety, guarantor, or endorser, as well as any cosureties, coguarantors, or endorsers, if the creditor does not commence legal action within three months after receiving the notice. Further, any notice which does not state the county in which the principal resides shall not be considered to be in compliance with the requirements of this Code section.
OCGA § 10-7-24