Police are warning music fans not to buy tickets for this year's Reading and Leeds festival from touts.
They say a number of fake tickets have been produced by criminals which are being sold on at inflated prices.
These tickets will not be accepted for entry and police are warning that the only way to be sure is not to buy from touts, despite both festivals being sold out.
John McNicholas, crime reduction adviser for Thames Valley Police ,said: "Revellers are urged to only bring what they can carry and to leave valuables at home.
"If you do bring anything into the site that is valuable to you then please make sure you use the lockers.
"I would also urge people not to be tempted to buy tickets from touts. If you do there will be a good chance that you are throwing your money away as your ticket could be fake."
The Reading and Leeds Festivals take place simultaneously from 22 to 25 August and will be headlined by The Killers, Rage Against The Machine and Metallica.