> For the complete documentation index, see [llms.txt](https://docs.kaana.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.kaana.com/guides/detection-rule-guides/billing-accuracy-rules.md).

# Billing Accuracy Rules

- [Rule: Failed Bill Run Detection (Zuora)](https://docs.kaana.com/guides/detection-rule-guides/billing-accuracy-rules/rule-failed-bill-run-detection-zuora.md)
- [Rule: Credit Memo Spike (Zuora)](https://docs.kaana.com/guides/detection-rule-guides/billing-accuracy-rules/rule-credit-memo-spike-zuora.md)
- [Rule: Usage-Based Billing Anomaly (Zuora)](https://docs.kaana.com/guides/detection-rule-guides/billing-accuracy-rules/rule-usage-based-billing-anomaly-zuora.md)