The posting of any notice required by law or the order of any court may be proved by filing a copy of the notice with an affidavit of posting in the court in which the proceeding was had in which the notice was required, and such affidavit shall be competent evidence in all courts and shall be prima facie evidence of what it states, but this shall not be the exclusive mode of proof.
Ala. Code § 12-21-69 (1975)