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# Zuora custom events for other features

> Describes Zuora custom events for features other than Orders, including Prepaid with Drawdown and Unbilled Usage.

Describes Zuora custom events for features other than Orders, including Prepaid with Drawdown and Unbilled Usage.

| Name                              | Related event                     | Description                                                                   |
| --------------------------------- | --------------------------------- | ----------------------------------------------------------------------------- |
| Prepaid Balance Threshold Reached | Prepaid Balance Threshold Reached | The number or percentage of the remaining balance reaches the threshold.      |
| Unbilled Usage Threshold Reached  | Unbilled Usage Threshold Reached  | The rating amount or usage quantity of a rating result reaches the threshold. |