https://docs.whmcs.com/9-0/tags/e-invoicing/Recent content in e-invoicing onHugo -- gohugo.iohttps://docs.whmcs.com/9-0/troubleshooting/troubleshoot-addon-modules/e-invoicing/e-invoicing-configuration-errors/Mon, 01 Jan 0001 00:00:00 +0000https://docs.whmcs.com/9-0/troubleshooting/troubleshoot-addon-modules/e-invoicing/e-invoicing-configuration-errors/Configuration validation errors in the E-Invoicing addon module occur when you save its settings with a required value left empty or in an invalid format, or with only one of the two license credentials entered, and produce messages such as The tax ID is invalid or The postcode is invalid. The article lists the validation rules for the License ID, License Key, Company Name, Tax ID, Email, Address, City, Postcode, Country, Phone, and Audit Log Retention (Days) settings, and explains how to read the error, correct the named value, enter both or neither license credential, and save the settings again. During the addon module’s limited release, Country must be Belgium.https://docs.whmcs.com/9-0/troubleshooting/troubleshoot-addon-modules/e-invoicing/e-invoicing-license-errors/Mon, 01 Jan 0001 00:00:00 +0000https://docs.whmcs.com/9-0/troubleshooting/troubleshoot-addon-modules/e-invoicing/e-invoicing-license-errors/License errors in the E-Invoicing addon module appear as License validation failed, Your license is suspended, or a Validating license state that never resolves, and they stop invoice export and status updates. The article explains that these are caused by an incorrect License ID or License Key (often after a license transfer or a license key reissue), a WebPros-suspended or lapsed subscription, or a server that cannot reach the e-invoicing service over outbound HTTPS on port 443, and gives the steps to retrieve the credentials from the Manage tab of the E-Invoicing license under Services > My Products & Services on WHMCS.com, re-enter them in the addon module settings after a reissue invalidates the previous key, check or renew the subscription, and confirm outbound connectivity.https://docs.whmcs.com/9-0/troubleshooting/troubleshoot-addon-modules/e-invoicing/e-invoicing-account-sync-errors/Mon, 01 Jan 0001 00:00:00 +0000https://docs.whmcs.com/9-0/troubleshooting/troubleshoot-addon-modules/e-invoicing/e-invoicing-account-sync-errors/Account synchronization errors in the E-Invoicing addon module occur when a banner reports that the account failed to synchronize with the e-invoicing service after you save otherwise valid settings. The article explains that the cause is an incorrect License ID or License Key, a temporary e-invoicing service outage, or a network issue that prevents the WHMCS server from reaching the e-invoicing service, and describes how to review the Activity Log under System Logs, resolve a 401 authentication error through the license errors article, and wait 15 to 30 minutes before re-saving to retry after a 5xx or connection error.https://docs.whmcs.com/9-0/troubleshooting/troubleshoot-addon-modules/e-invoicing/e-invoicing-client-data-errors/Mon, 01 Jan 0001 00:00:00 +0000https://docs.whmcs.com/9-0/troubleshooting/troubleshoot-addon-modules/e-invoicing/e-invoicing-client-data-errors/Client data errors in the E-Invoicing addon module appear as an info icon beside a client in the Client Management section at Addons > E-Invoicing, warning that client data is missing or that the contact failed to export to the e-invoicing service, or as an Activity Log entry stating that E-Invoicing is not enabled for the client. The article explains that the causes are empty or invalid required values, a contact that the e-invoicing service rejected, or a client without E-Invoicing enabled, and covers how to complete the Name, Country, Currency, and Tax ID values with the Tax ID length and character rules, retry the invoice in Invoice Management, and turn on Enable E-Invoicing in the E-Invoicing Information section of the client Profile, noting that enabling it does not export past invoices.https://docs.whmcs.com/9-0/troubleshooting/troubleshoot-addon-modules/e-invoicing/e-invoicing-invoice-export-errors/Mon, 01 Jan 0001 00:00:00 +0000https://docs.whmcs.com/9-0/troubleshooting/troubleshoot-addon-modules/e-invoicing/e-invoicing-invoice-export-errors/Invoice export errors in the E-Invoicing addon module occur when an invoice does not export to the e-invoicing service or shows an Error status in the E-Invoicing Status column in the Invoice Management section at Addons > E-Invoicing, caused by an ineligible invoice, a client contact that has not exported, or an error returned by the e-invoicing service. The article lists the eligibility requirements (a non-Draft invoice with a total greater than zero, a tax, E-Invoicing enabled with complete client data and an exported contact, and an invoice that is not already exported), and explains how to read the Activity Log and resolve authentication (401), validation (4xx), and server or connection (5xx) errors, including the manual Retry limit of three attempts per hour.https://docs.whmcs.com/9-0/troubleshooting/troubleshoot-addon-modules/e-invoicing/invoice-already-submitted-errors/Mon, 01 Jan 0001 00:00:00 +0000https://docs.whmcs.com/9-0/troubleshooting/troubleshoot-addon-modules/e-invoicing/invoice-already-submitted-errors/Editing an exported e-invoice is not possible in the E-Invoicing addon module because WHMCS treats an invoice as immutable once it exports the invoice to the e-invoicing service, and attempting to change it shows a warning that the system has already submitted the invoice for e-invoicing. The article explains that legal compliance requires this immutability and describes the correct workflow: reissue the invoice so that the addon module exports the corrected invoice to the e-invoicing service as a separate document, and use the WHMCS Credit Note feature to reverse the original when appropriate.https://docs.whmcs.com/9-0/troubleshooting/troubleshoot-addon-modules/e-invoicing/e-invoicing-status-update-errors/Mon, 01 Jan 0001 00:00:00 +0000https://docs.whmcs.com/9-0/troubleshooting/troubleshoot-addon-modules/e-invoicing/e-invoicing-status-update-errors/Status update errors in the E-Invoicing addon module occur when an invoice exports successfully but its status never updates, or when the webhook that the e-invoicing service uses to send status changes fails with a 401 response. The article explains that the cause is a missing or incorrect License Key or a webhook endpoint that the e-invoicing service cannot reach because a firewall, web application firewall, or URL misconfiguration blocks inbound POST requests, and gives the steps to confirm the License Key, verify that the webhook endpoint at modules/addons/einvoicing/webhook.php is publicly accessible, and review the Activity Log for webhook entries.https://docs.whmcs.com/9-0/troubleshooting/troubleshoot-addon-modules/e-invoicing/refused-e-invoice-status/Mon, 01 Jan 0001 00:00:00 +0000https://docs.whmcs.com/9-0/troubleshooting/troubleshoot-addon-modules/e-invoicing/refused-e-invoice-status/A Refused e-invoice status in the E-Invoicing addon module means the recipient rejected the e-invoice in their own system and the rejection response returned through the e-invoicing service, which is a business outcome rather than a system error and appears in the E-Invoicing Status column in the Invoice Management section at Addons > E-Invoicing. The article lists common reasons for rejection, such as incorrect routing rules or acceptance criteria, a manual rejection made by mistake, or invoice content that does not match the recipient’s requirements, and advises contacting the client to agree on corrective action and reissuing a corrected invoice when the data must change.