N.C. Gen. Stat. § 131F-10
Any person who is not a charitable organization or sponsor and who places or maintains a collection receptacle in public view for the purpose of collecting donated clothing, household items, and other items for resale shall display on all sides of each collection receptacle a permanent sign or label with the phone number or electronic mail address of a contact for the person and the following statement: "This is not a charity. Donations made here support a for-profit business and are not tax deductible." The sign or label shall be placed on all sides of the collection receptacle with the required information printed in letters that are no less than three inches in height and no less than one-half inch in width and in a color that contrasts with the color of the collection receptacle so that the sign or label is clearly visible. Upon request, the person must provide the donor with documentation of its license issued under this Chapter.
N.C. Gen. Stat. § 131F-10