How to generate a QR code?

Works OK but I'd like my form, (parking reservation), once filled out by a customer, to generate two populated forms; one sent to the customer as an electronic reserved parking pass with a QR code containing their information and another sent to me as an electronic populated form. Upon entering my parking lot, the customer presents his electronic pass from his device for me to scan. The encrypted QR code information is cross referenced with the populated form I have on file to validate their parking reservation and confirm their attendance.

Please check the Dynamic QR Code widget. This widget can generate a QR code based on your form user's answers.

When the users submit the form the mentioned widget will generate the QR code that you can later use to check the data. You can send the QR code to the user via Autoresponder Email.