Pedro Chirivella, who had been on loan at Spanish club Extremadura last season, was not registered to play for Jurgen Klopp's side at Stadium MK
Liverpool were fined £200,000 ($246,000) by the English Football League Wednesday after fielding an ineligible player in their League Cup win at Milton Keynes Dons.
Spanish midfielder Pedro Chirivella featured as a substitute for Liverpool after coming on for the last 28 minutes of the 2-0 third-round win last week.
Chirivella, who had been on loan at Spanish club Extremadura last season, was not registered to play for Jurgen Klopp's side at Stadium MK.
Liverpool had not secured an international transfer certificate, which was required after the 22-year old's return to Anfield following his loan.
It was suggested Liverpool could be kicked out of the League Cup as punishment.
BREAKING NEWS: Liverpool fined £200,000 but escape expulsion from the Carabao Cup pic.twitter.com/SjL6Bmx5lv— Goal (@goal) October 2, 2019
But instead Liverpool have been fined, with £100,000 of the penalty suspended.
Liverpool requested the paperwork in July but the process can only be completed with the English Football Association's intervention.
It is believed that is where the Champions League holder think the error has been made.
Liverpool would be liable to pay the suspended £100,000, plus face an additional sanction, if they fielded an ineligible player again in the League Cup before the end of next season.