Manchester United have submitted a claim of mistaken identity to the Football Association after Fabio da Silva was booked by referee Chris Foy against Barnsley in the Carling Cup.
Instead the offender – for a challenge on Jamal Campbell-Ryce – was his twin brother Rafael.
The FA confirmed they have been approached by United and the submission will be heard on Tuesday by a regulatory commission.
The Brazilian twins helped United secure a place in the quarter-finals of the competition thanks to a 2-0 victory.
However the holders finished the game with 10 men after Foy sent off Gary Neville for clattering into Adam Hammill.