Miss. Code Ann. § 27-43-7: Miss. Code Ann. § 27-43-7

The notice shall be mailed to said lienors, if any, to the post-office address of the lienors, if such address is set forth in the instrument creating the lien, otherwise to the post-office address of said lienors, if actually known to the clerk, and if unknown to the clerk then addressed to the county site of the said county.