Crystal Palace have been fined by the Premier League over an allegation that information regarding the Cardiff lineup prior to the sides' encounter in Wales last season was leaked to the London side.
The Premier League board upheld a complaint from the Bluebirds, who alleged that Ole Gunnar Solskjaer's team information was leaked to officials at Palace two days prior to the match on April 5, which the Eagles won 3-0.
Palace could face a fine of up to 25,000 pounds for the incident, which breached the "good faith" principle which clubs must hold towards each other.
"The Premier League board has considered a complaint from Cardiff City regarding the conduct of a Crystal Palace official," a statement from the League read.
"The board found that Crystal Palace breached Rule B.16 and has exercised its summary jurisdiction and fined the club."
Rule B.16 states that "in all matters and transactions relating to the League each club shall behave towards each other club and the league with the utmost good faith."
The South Wales Echo quoted a source at the time as saying: "The evidence is heavy. The club has a copy of an SMS message sent which includes the exact team Solskjaer was going to start with."
The Sun published what it said was the text message in question, saying it had been sent from Palace sporting director Iain Moody's phone. As well as the Cardiff team, the text reportedly also contained the name of a player who revealed the information, but this was censored by the paper for legal reasons.
Moody, who worked at Cardiff until he was sacked in October, denied he had received information from "anyone who works for Cardiff City," telling The Sun the claims were "extraordinarily untrue."
Palace co-owner Steve Parish said an unnamed agent read 11 names over the phone to Moody, but only nine of those actually started.
Cardiff had no comment to make on the matter following Palace's fine.
Information from the Press Association was used in this article.