To generate a list of all reservations with open payments, just follow the steps below:

1. Access [Reservation Center > Find Reservation];
2. Filter the period you want;
3. Click on [Add/Hide Filters];
4. Check the [Reservations where the total amount has not yet been paid] box;
5. Click on [Update].

This type of filter is widely used to survey reservations with a check-out close and without full payment yet, for example.