Charlton will study DVD footage of skipper Christian Dailly's dismissal in the 3-2 win over Yeovil before deciding whether to launch an appeal.
Charlton were reduced to 10 men in the 71st minute after Dailly saw red for an elbow on Sam Williams, but the visitors also went a man down 14 minutes later when Paul Huntington fouled Akpo Sodje in the area.
"We're going to have a look at Christian Dailly's red card on the video. Christian is not the sort who would lead on an elbow," said Charlton assistant-manager Tim Breacker.
"He's quite adamant it was his head that he caught.
"It was a good result for us, but obviously the performance wasn't as great as we would have liked.
"Maybe it's a sign of a good team that when things aren't quite flowing, as they did last week at Peterborough, that we still pick up the three points."
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