Zuora categorizes standard events based on their associated objects. Each standard event has a unique event category code and falls under a parent category, represented by a unique parent category code.

• Parent category code: This code represents a product area or object in Zuora. You can specify a parent category as the related event in an email or a callout template, and link the template to notification definitions for any standard, custom, or custom scheduled events within that category. For example, if you set 1100 - Invoice as the related event in a callout template, you can link the template to notifications for events such as 1110 - Invoice Posted , 1140 - Invoice Due , or any custom or custom scheduled events associated with the Invoice object.

• Event category code: This code represents a standard event. You can specify a standard event as the related event in a notification definition, email template, or callout template. For email or callout templates linked to a specific standard event, you can only link them to notifications for the same event.

The Credit and Debit Memo event categories are available only if the Invoice Settlement feature is activated.