If your merchant account supports 3DS/VbV, you should let us know at the time we create your Caterpay account so that we can activate this feature.
This will then give you the option of securing your payments for any website bookings using the additional verification step.
From the Preferences tab within MMS, you can configure how you wish to handle the four possible outcomes. Moving your mouse over the blue "?" to the right explains each scenario. You might wish to balance risk vs reward by not setting all of the options to reject but each business must make their own decisions on this.