The promotion, which runs until November, offers several prizes, the biggest being the chance for four winners to win a tailored experience with footballers Harry Kane, Neymar Jr., Steph Houghton or Virgil Van Dijk.
Other prizes include personalised video messages, signed shirts and £10 and £15 high street vouchers.
To participate, shoppers buy participating packs and visit worldie.cadburyfc.com (accessible via an on-pack QR code) to enter the products’ batchcode and bardcode for a chance to win.
Mondelez is supporting the promotion with in-store PoS material and digital, social media and out-of-home advertising.
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