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# 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.