> For clean Markdown of any page, append .md to the page URL. > For a complete documentation index, see https://zuora.ferndocs.com/docs/platform/integration/integration-hub/core-connectors-and-applications/enhanced-invoice-numbering/configure-enhanced-invoice-numbering/llms.txt. > For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://zuora.ferndocs.com/_mcp/server. # Configure Enhanced Invoice Numbering > The Enhanced Invoice Numbering app is not available for purchase anymore. The information on this page is intended to be used by customers who have purchased the app previously. The Enhanced Invoice Numbering app is not available for purchase anymore. The information on this page is intended to be used by customers who have purchased the app previously. For the Enhanced Invoice Numbering app to work, you need to configure settings in Zuora and in the app. > The Enhanced Invoice Numbering app is not available for purchase anymore. The information on this page is intended to be used by customers who have purchased the app previously. ## Docs - [Disable automatic posting of Bill Runs in Zuora](https://zuora.ferndocs.com/docs/platform/integration/integration-hub/core-connectors-and-applications/enhanced-invoice-numbering/configure-enhanced-invoice-numbering/disable-automatic-posting-of-bill-runs-in-zuora.md): Learn how to disable automatic posting of bill runs in Zuora to prevent sending duplicated invoices. - [Add custom fields for the App in Zuora](https://zuora.ferndocs.com/docs/platform/integration/integration-hub/core-connectors-and-applications/enhanced-invoice-numbering/configure-enhanced-invoice-numbering/add-custom-fields-for-the-app-in-zuora.md): Add custom fields for account, invoice, and invoice number entities in Zuora. - [Configure notifications for the App in Zuora](https://zuora.ferndocs.com/docs/platform/integration/integration-hub/core-connectors-and-applications/enhanced-invoice-numbering/configure-enhanced-invoice-numbering/configure-notifications-for-the-app-in-zuora.md): Learn how to configure notifications for billing events in Zuora, including setting up notification settings, delivery options, and callout authentication. - [Configure Settings in the App](https://zuora.ferndocs.com/docs/platform/integration/integration-hub/core-connectors-and-applications/enhanced-invoice-numbering/configure-enhanced-invoice-numbering/configure-settings-in-the-app.md): Learn how to configure settings in the app, including selecting options, configuring fields, and saving changes.