The full extent of the Fifa rules breaches that led to Chelsea’s transfer embargo was revealed on Thursday, with the club found guilty after appeal of 150 breaches of transfer rules involving 69 different academy-age players over the last 10 years.

Fifa published the appeal verdict detailing Chelsea’s lawyers’ attempts in April to overturn the two-transfer window embargo – arguing that unregistered academy players were simply triallists, including one who had appeared in 75 games over the course of three seasons.

The club also made the case that Premier League academy games were not strictly association football, as recognised by Fifa, in order to try to circumvent the rule that non-registered players could not represent the club. In this instance, they cited evidence from the Premier League’s technical director Richard Garlick on the basis that the games were not directly authorised by the Football Association.

In both cases, the Fifa appeals committee took a dim view of the arguments advanced by the club. It upheld the decision to ban them from signing any players for two transfer windows – encompassing last summer and the coming January – with the exception of English academy players under the age of 16. The club’s fine of 600,000 CHF (£470,000), as well as legal costs was also upheld.