In this case, you can restrict your box so that only people who've recorded a find on another box can see it. This restriction was created specifically for bonus boxes, but it's not restricted to them. You can add this restriction to any type of box and it can be dependent on the finds of any other type of box. For instance, if you put LTCs in one of your letterboxes for finders to take, you can restrict the LTC to people who've found that letterbox.

To create this sort of dependency, enter the box # of the "parent" box—the one that has to be recorded as a find before the one you're listing will show up. If the parent is a series, click the "Restrictions" button to save your changes and reload the page, and AQ will display each of the boxes within the series so you can pinpoint precisely which box in the series is the trigger to reveal your listing. If you don't select a specific box within a series, AQ will use the first box in the series by default.

The owner, planters, carvers, and anyone in your exceptions list will be able to see the listing without recording a find on the parent box.