Steam fans are being warned not to buy tickets for the Flying Scotsman's visit to Peterborough later this month on Ebay.
The iconic locomotive is visiting Nene Valley Railway at the end of September, with visitors able to take a ride in carriages pulled by the engine.
Tickets for the event sold out weeks ago - and now Nene Valley Railway is warning people who buy tickets on Ebay and similar sites that they will not be allowed in.
A spokesman said: "Sadly we have already seen people trying to re-sell Flying Scotsman tickets for profit on the likes of Ebay etc.
"Therefore we would like to bring to everyone’s attention section 4 of our terms and conditions, specifically clause 4.4. This clause explains that we will cancel any tickets found to be for sale (refunding the cost minus administrative charges of £5 per ticket) so anyone holding that ticket will be refused entry and they will be null and void."
The Flying Scotsman will be in Peterborough on September 29, 30 and October 1.
It is visiting Nene Valley Railway as part of a national tour. The weekend and Peterborough was selected after The Flying Scotsman had to stop at Nene Valley Railway when it suffered mechanical problems while travelling to Ely last year.
The loco needed to stay at Nene Valley Railway for a week while repairs were carried out on the axles.
For more information about the Flying Scotsman's visit to the city, visit www.nvr.org.uk