Better safe than sorry !
To add the Mondial insurance, it's very simple, just choose one of the two options offered on the payment page of your Click&Boat booking: Cancellation and Medical Assistance or Medical Assistance only.
The amount to be paid will automatically be added to the total amount of your booking.
You can add the Mondial Insurance up to 10 days after the confirmation of your booking.
Mondial Assistance's services and guarantees are detailed and available HERE.