> ## Documentation Index
> Fetch the complete documentation index at: https://docs.roomdoo.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Correct an invoice / issue a credit note

> How invoice correctives are handled on validated invoices and what we need to issue one.

## When a corrective is needed

Once an invoice is validated, **it can't be modified** — the numbering is irreversible. To correct errors, a **corrective invoice** is issued, referencing the original and voiding it fully or partially.

Typical cases:

* The amount was wrong and needs adjusting (up or down).
* There was a date change after validation.
* The billable customer changes (the invoice goes to a different person or company).
* Lines need to be added or removed.
* The reservation was cancelled and the amount needs refunding.

## How it's done

Correctives are handled on our side. **Contact support** with:

* Booking reference
* Number of the invoice to correct
* What needs fixing (amounts, customer data, lines, etc.)
* If the corrective implies a refund, how to process it (original method, credit, etc.)

We let you know once the corrective is issued.

<Note>
  The corrective is always sent to the tax authority (AEAT in Spain) via VeriFactu, just like the original. Fiscal traceability is preserved end to end.
</Note>

## Common cases

<AccordionGroup>
  <Accordion title="I validated the invoice too early by mistake">
    Don't worry — contact support and we'll correct it with the right data. The original invoice is voided by the automatic credit note.
  </Accordion>

  <Accordion title="The customer is asking for a refund and a full credit note is needed">
    The corrective with 0 € amount (full credit note) is issued from our side. Let us know whether the refund goes back to the original method or stays as credit for future stays.
  </Accordion>

  <Accordion title="I just need to change the name or tax ID of the invoiced customer">
    If the invoice is **not under VeriFactu** and **less than 48h** have passed, you can update the contact data from its record and the new data shows on the invoice — the full step-by-step is in [Modify invoice details](/en/invoicing/modify-invoice-details). In any other case (typical in Spain), contact support: changing the invoiced customer data requires a corrective.
  </Accordion>

  <Accordion title="The original invoice had a payment and the corrective reduces it">
    If after the corrective there's an overpayment, when you contact support let us know whether to refund it to the original method or leave it as credit.
  </Accordion>
</AccordionGroup>

## When to contact support

**Whenever you need a corrective.** Accounting changes to a validated invoice are handled from the Odoo back-office.

<Warning>
  Don't try to "void" the validated invoice by deleting it directly. Fiscal numbering and submissions to the tax authority can't be undone — always use the corrective.
</Warning>