# CHECKOUT999: Checkout unexpected

## What this means[​](#what-this-means "Lien direct vers What this means")

Checkout hit an unexpected problem.

Check the order in your store admin before charging the customer again. Export diagnostics and contact support if the problem repeats.

## What to do[​](#what-to-do "Lien direct vers What to do")

Check the details below before trying again. WCPOS does not retry this by itself — retry when you are ready.

## Your data[​](#your-data "Lien direct vers Your data")

The outcome could not be confirmed — verify before retrying. If this persists, export diagnostics and contact WCPOS support.

## Details[​](#details "Lien direct vers Details")

* **Code:** `CHECKOUT999` (`CHECKOUT_UNEXPECTED`)
* **Severity:** error
* **Introduced in:** WCPOS 1.10.0