(NBCDFW) - A Texas crackdown is under way on merchants who sell wine online without paying for proper permits and taxes. The Texas Alcoholic Beverage Commission worked with FedEx and other shippers to identify incoming wine deliveries from companies that do not comply with state law. “We sent them letters and asked them to cease and desist,” TABC Maj. Charlie Cloud said. Texas alcoholic beverage sales operate under a three-tier system. Retailers must buy from licensed Texas wholesalers, which purchase from producers. However, licensed wineries are also allowed to sell directly to customers.