Go to Settings > Channel Manager > Preferences and set Auto report failed cards = Yes
'''Trigger tab:''' *Trigger Event = After Booking(but not after checkout)
*Trigger Time = Immediate
*Trigger Window = 365999 Booking Source:*Booking Source = AllBooking.com Booking Conditions:*Booking Status = All but not cancelled
*Booking Info Code = BOOKINGCOMCARD
'''Booking tab:'''
*Execution = One time only
*Flag Text = Failed CC reported to Booking.com