---
id: help.invoices.change
title: "Change an invoice after sending"
canonical: https://docs.secureprocessing.app/help/invoices/change-an-invoice-after-sending
description: "Once an invoice is finalised, its lines, amounts and due date are fixed. To change one, void it if nothing has been paid, and make a new one."
last_verified: 2026-11-02
---

# Change an invoice after sending

Once an invoice is finalised, its lines, amounts and due date are fixed. To change one, void it if nothing has been paid, and make a new one.

Who can: Owner, Administrator, Developer, Support can do this in [Invoices](https://dashboard.secureprocessing.app/invoices).

## While it is a draft

You can add lines under **Add a line**, and remove one with its **✕**. The customer, the currency, the due date and partial payment are set when you make the draft, so to change those, press **Discard** and make another.

## Once it is finalised

Finalising fixes the lines, the amounts and the due date, because your customer may already have the document. Nothing on it can be changed from the dashboard.

To correct it:

1. Press **Void** on the wrong invoice. It keeps its number, and stays on record.
2. Make a new invoice with the right details, and finalise it. It gets the next number.

If your customer has already paid part of it, it cannot be voided. Refund what they paid first, or tell them about the change and charge the difference on a new invoice.

## For your developer

The **Note to the customer**, the **Small print** and metadata can still be changed through the API while the invoice is open.

For developers: [Invoicing](https://docs.secureprocessing.app/invoicing.md)

## Related

- [Void an invoice or write it off](https://docs.secureprocessing.app/help/invoices/void-or-write-off.md)
- [Invoice numbers](https://docs.secureprocessing.app/help/invoices/invoice-numbers.md)
- [Create and send an invoice](https://docs.secureprocessing.app/help/invoices/create-and-send-an-invoice.md)

Still stuck? Write to [admin@secureprocessing.app](mailto:admin@secureprocessing.app) with the invoice’s number and what needs changing.