Fillies' Mile
Certify (foaled 12 March 2010) is an American-bred, British-trained Thoroughbred racehorse. In her first season of racing, which began in July 2012 she won all four of her races including the Group One Fillies' Mile and ended the British season as one of the year's most highly rated two-year-old fillies. She was regarded as a leading contender for the following year's classics but was suspended from racing after failing a drug test in April 2013.