By joining in the www .mybkexperience.com Survey within 7 days at the official survey portal, please open the address bar and type the url : www .mybkexperience .com . Select En ESPANOL or ENGLISH Language. Sign In to proceed the Burger King free whopper survey, if you don't see 21 (Twenty-one) digit survey codes with a required purchase (Free WHOPPER Sandwich) with receipt code requirement, Go to the burger king survey website on www. mybkexperence.com for partcipating whopper sandwich surveys. The Burger King customers satisfaction survey is displayed on mybkexperience site. Take www. mybkexperience.com free whopper survey to acquire a (Buy 1 Get 1 Sandwich code) at your nearby Burger King restaurant. Then Validation codes can generate for redemption purpose of the (Validation numbers) offer printing on your recent printed receipt.