Therefore, even assuming that Tamaroff and Maggard had no other specific legal remedy, mandamus still would not lie. OCGA § 9-11-4 (c) provides a trial court with the authority as well as the discretion to appoint disinterested persons, who are citizens of the United States and at least 18 years of age, as permanent process servers. In Re Denhardt, 231 Ga. App. 203 ( 498 S.E.2d 772) (1998). Contrary to Tamaroff's and Maggard's assertion, it does not mandate that the trial court make such an appointment when the statutory requirements have been satisfied.