(5) A certified process server as provided in Code Section
9-11-4.1.
Where the service of process is made outside of the United States, after an order of publication, it may be served either by any citizen of the United States or by any resident of the country, territory, colony, or province who is specially appointed by the court for that purpose. When service is to be made within this state, the person making such service shall make the service within five days from the time of receiving the summons and complaint; but failure to make service within the five-day period will not invalidate a later service.