How do I redeem my McDonald's 50% off voucher? For full terms and conditions and how to redeem this offer, please visit here. Related articles Can I buy my ticket online using a Promotional Voucher? How do I redeem my Kellogg's Grown Ups Go Free voucher? How do I redeem my Cadbury Free Ticket promotional voucher? Will any Rides or Attractions be closed for my visit? Can I contact you via live chat?