Notify Groupon of any changes made to a booking from your system such as cancellations initiated by your system.

In order to manage the validity of passes and vouchers Groupon needs to understand whether a user attended a booking or not. Groupon expects an explicit signal from your system for each booking within the same calendar day as the appointment (i.e. by 23:59:59).

For bookings where Groupon has not received an explicit signal from your system we will synthetically mark the booking as redeemed, as if the user has attended the appointment.

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