It is important to monitor the "health" of your FarApp integration by staying on top of any orders, items, refunds, etc that might have errors when FarApp tries to sync data for them. The best and easiest way to do this to configure you Notification settings in FarApp so FarApp will send you daily error report emails for your different types of syncs.
You can manage all the various notifications that FarApp can send at https://app.farapp.com/settings#/notification_settings. All settings accept a comma-separated list of email addresses to send the reports to. Some notifications may not be sent unless your FarApp account is currently processing those types of feeds. For example, if FarApp isn't setup to process custom record updates, then adding your emails to that field won't have an effect.