Before you give your Fitbit device to another person or return it, erase the device to remove apps, stored data, personal information, credit and debit cards* (for devices with contactless payments), and saved settings.
*Note that erasing your Fitbit device doesn’t remove Suica. If you use Suica, remove Suica in the Fitbit app before giving your Fitbit device to another person. For more information, see How do I use Suica on my Fitbit device?