Arctic Monkeys third album, Humbug, is released later this month
Arctic Monkeys have hidden "golden tickets" to this year's Reading And Leeds Festivals inside two copies of their new single.
Shoppers picking up vinyl versions of Crying Lightning from Oxfam could see the band headline the festivals.
Forty signed copies of the seven-inch single will also be distributed throughout Oxfam's 700 shops in the UK.
Arctic Monkeys will headline the festivals alongside Radiohead and Kings Of Leon on 29 and 30 August.
Crying Lightning is the first single from the band's forthcoming third album, Humbug.
The song is already available to download, but the limited edition seven-inch will be available at Oxfam stores from Monday, with proceeds from the £2.99 price tag donated to the charity.
The "golden tickets" will contain a code that the finders can enter online.
A 10-inch version of the single is also being sold through conventional record shops.
It is the first time since Band Aid's Do They Know It's Christmas? in 1984, that Oxfam shops have sold a new release single.
David McCullough, Oxfam's director of trading, said: "Oxfam shops have always been one of the best places on the high street to pick up a musical bargain or find a rare treasure."