How to update billing details on a paid invoice

You do not need to do anything special. When you update a customer's billing information in Lago, the invoice detail page reflects the new details immediately, even on finalized, paid invoices, because Lago reads billing details from the customer record rather than snapshotting them onto the invoice.

Updating the PDF

The PDF already sent to the customer will not reflect the new details until the next billing cycle. There is an open feature request to allow regenerating the invoice PDF when resending.

If you need an updated PDF for the current billing cycle:

1. Refund the original invoice.

2. Update the customer's billing details.

3. Void and regenerate the invoice. This triggers a new payment attempt, which is why the original invoice needs to be refunded first.

This article reflects guidance drawn from customer case resolutions. It is not officially supported documentation and may not apply to all situations.