Manchester City have been banned from European club competition in 2020/21 and 2021/22 after being found to have committed "serious breaches" of Uefa's club licensing and financial fair play regulations.
The reigning Premier League champions overstated sponsorship revenue in accounts submitted between 2012 and 2016, according to the European football's governing body.
They have also been fined 30m euros (£25m).
City said they are "disappointed but not surprised" by UEFA's announcement and will appeal against the punishment to the Court of Arbitration for Sport (CAS). The statement said: "The club has always anticipated the ultimate need to seek out an independent body and process to impartially consider the comprehensive body of irrefutable evidence in support of its position. "Simply put, this is a case initiated by UEFA, prosecuted by UEFA and judged by UEFA.
In a statement the Adjudicatory Chamber said they considered all the evidence and found that Manchester City Football Club committed serious breaches of the UEFA Club Licensing and Financial Fair Play Regulations by overstating its sponsorship revenue in its accounts and in the break-even information submitted to UEFA between 2012 and 2016.
"We have imposed disciplinary measures on Manchester City Football Club directing that it shall be excluded from participation in UEFA club competitions in the next two seasons (ie: the 2020/21 and 2021/22 seasons) and pay a fine of 30 million euros."
Uefa launched an investigation after German newspaper Der Spiegel published leaked documents in November 2018 alleging City had inflated the value of a sponsorship deal, misleading European football's governing body. Reports alleged City - who have always denied wrongdoing - deliberately misled Uefa so they could meet FFP rules requiring clubs to break even. City were fined £49m in 2014 for a previous breach of regulations.