As many as 2.93 lakh ration card holders did not turn up to receive rations for three months and none of them filed any complained to the government since the introduction of biometric-linked system for foodgrain distribution, the Delhi Food and Civil Supplies Department said. It said that 99.4 percent of the beneficiaries of the food security scheme had taken their ration after biometric authentication through the e-point of sale (e-POS) system was introduced on January 1.