---
title: Troubleshoot
description: Troubleshoot common Cloudflare billing issues.
image: https://developers.cloudflare.com/core-services-preview.png
---

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

[Skip to content](#%5Ftop) 

# Troubleshoot

Use these guides to diagnose billing errors, payment failures, invoice discrepancies, and subscription changes.

[Billing error reference](https://developers.cloudflare.com/billing/troubleshoot/error-reference/) 

Look up common billing error messages and find the right fix.

[Troubleshoot invoices](https://developers.cloudflare.com/billing/troubleshoot/troubleshoot-invoices/) 

Resolve missing company details, billing contact changes, and invoice amount differences.

[Resolve a payment failure](https://developers.cloudflare.com/billing/troubleshoot/troubleshoot-failed-payments/) 

Fix declined cards, failed 3D Secure authentication, and failed renewal payments.

[Resolve the zone cannot be upgraded error](https://developers.cloudflare.com/billing/troubleshoot/resolve-zone-cannot-be-upgraded/) 

Fix upgrade errors caused by unpaid balances on an account or domain.

[Resolve "you cannot modify this subscription"](https://developers.cloudflare.com/billing/troubleshoot/resolve-you-cannot-modify-this-subscription/) 

Understand what to do when a subscription is already scheduled for cancellation.

[Resolve "cannot remove payment method"](https://developers.cloudflare.com/billing/troubleshoot/resolve-cannot-remove-payment-method/) 

Remove a payment method after active subscriptions, pending charges, or Registrar renewals are cleared.

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```