The England Rugby Football Union have been warned by Rugby World Cup organisers after England's shirt numbers - applied by a New Zealand company - began to rub off during their match against Argentina.
Rugby World Cup Ltd have sought assurances the same will not happen in the side's Pool B encounter on Sunday against Romania, the Telegraph reports.
Otherwise the England RFU may face receive a fine.
During the encounter against Los Pumas at Dunedin's new fully enclosed stadium on Saturday night, which England won 13-9, the white player numbers on the back of England's black away strip peeled off over the course of the game.
Tournament rules require a clear number to be visible, not just for fans and broadcasters, but for the benefit of referees, touch judges and anti-doping officers to identify players.
