Factukit: Checkout Fields for Verifactu

The "Factukit: Checkout Fields for Verifactu" plugin is a WooCommerce extension that adds fiscal identification fields to the checkout. It allows invoicing software systems (SIF), accounting software ERPs and other business management systems to collect the necessary data to submit invoices to the Spanish Tax Agency's Verifactu system. To submit invoices to Verifactu, in addition to installing the plugin, it is necessary to create an integration with an official invoicing software system valid for the AEAT, such as WP Verifactu: https://wpverifactu.com. Main Features

• Adds mandatory fields to WooCommerce checkout for customer fiscal identification
• Support for multiple document types: NIF/CIF (DNI, CIF), Passport, NIE, Residence Certificate, Other supporting documents and Not registered
• Real-time validation of NIF/NIE format with control digit verification algorithm
• Integrated VIES validation for European VAT numbers with automatic verification against the official European database
• Automatic VAT exemption for intra-community transactions validated by VIES
• "Customer Type" field that allows users to define their tax profile:
• Individual: For natural persons making personal purchases
• Business/Self-employed: For companies, freelancers and professionals requiring business invoicing
• Company Name that appears automatically when "Business/Self-employed" is selected
• Form simplification hiding unnecessary fields when "Individual" is selected
• Flexible configuration: Checkout fields can be mandatory or optional according to WordPress management panel configuration
• €3,000 limit: When optional fields are enabled, they become mandatory automatically for purchases over €3,000
• Tax classes: Automatic creation of specific WooCommerce tax classes such as "Online courses" and "Travel"
• Multiple languages: Support for Spanish, Catalan, Basque and Galician
• Processing to Completed status changes: The plugin allows changing status from Processing to Completed automatically when an order is placed, from the WordPress management panel

Requirements

• WordPress 5.8 or higher
• WooCommerce 5.0 or higher
• PHP 7.4 or higher

1.0.3

• ID validation correction in the Classic Checkout

1.0.2

• Real-time local validation in both checkouts.
• Server-side uppercase normalization of identifier for both checkouts.
• Tax cleanup and refresh when loading checkout and when changing type/validating.

1.0.1

• Adds local checksum validation for NIF/CIF (and other countries) using internal validator.
• Validates VAT using ISO prefix from the number itself if it exists (e.g. FR... even if another country is selected).
• Integrates official VIES via REST as first option and VATcomply as fallback with cache to limit queries.
• Forces visibility of Company field in blocks checkout without duplicating custom fields.
• Improves validation in blocks checkout using official hooks to prevent purchases with invalid fiscal data.

1.0.0

• Initial plugin version
• Fiscal identification fields in checkout
• NIF/NIE validation
• Admin panel integration
• CSV data export