Last day for advertising tax liens. GS 105-369c
(c) Time and Contents of Advertisement. – A tax collector's failure to comply with this subsection does not affect the validity of the taxes or tax liens. The county tax collector shall advertise county tax liens by posting a notice of the liens at the county courthouse and by publishing each lien at least one time in one or more newspapers having general circulation in the taxing unit. The municipal tax collector shall advertise municipal tax liens by posting a notice of the liens at the city or town hall and by publishing each lien at least one time in one or more newspapers having general circulation in the taxing unit. Advertisements of tax liens shall be made during the period March 1 through June 30. The costs of newspaper advertising shall be paid by the taxing unit. If the taxes of two or more taxing units are collected by the same tax collector, the tax liens of each unit shall be advertised separately unless, under the provisions of a special act or contractual agreement between the taxing units, joint advertisement is permitted.