An exemption certificate issued by the purchaser authorizes a retailer to sell an item to the holder of the certificate and not collect tax on the sale. A person who no longer qualifies for an exemption certificate must give notice to each seller that may rely on the exemption certificate on or before the next purchase. A person who purchases an item under an exemption certificate is liable for any tax due on the purchase if the Department determines that the person is not eligible for the exemption certificate or if the person purchased items that do not qualify for an exemption under the exemption certificate. The liability is relieved when the seller obtains the purchaser's name, address, type of business, reason for exemption, and exemption number in lieu of obtaining an exemption certificate.
N.C. Gen. Stat. § 105-164.28A