Booking an apartment on Dobovo is confirmed by the prepayment that you make to the site. The next part of the payment, if it is, must be paid directly to the owner. Also, most of the owners take a security deposit from the guests and/or tourist tax.
Dobovo company strongly does NOT recommend you to send money to the owner prior to your arrival, but to make all payments at the time you check-in to the apartment. So you can insure yourself from unforeseen situations on a trip.