Police were called to Fitzwilliam Railway Station after a passenger and a train conductor got into an argument over a travel card.
Officers from the British Transport Police (BTP) were called at around 3.50pm on Friday, January 10, to reports that a woman was refusing to leave the train and was preventing the doors from closing by standing in the way.
The passenger and the conductor had disagreed over the validity of a rail travel pass. The woman had left the train when officers arrived.
An investigation has now been launched and the BTP has since identified and interviewed the passenger. The conductor is also being interviewed.
Trains were delayed by around 30 minutes due to the incident.
Anyone who was on the train and witnessed the incident is asked to call 0800 405040 and quote incident number 300 of January 10.