Greek VAT & Invoices for WooCommerce

🇬🇷 Simple Greek VAT fields for WooCommerce checkout

Add essential Greek tax fields (ΑΦΜ, ΔΟΥ, Business Info) and Invoice/Receipt selection to your WooCommerce checkout. Clean, lightweight, and easy to use.

Key Features

• Invoice/Receipt Selection – Let customers choose between “Τιμολόγιο” or “Απόδειξη”
• VAT Number (ΑΦΜ) – Required for invoices, numeric only with 9-digit validation
• Tax Office (ΔΟΥ) – Customer’s tax office field
• Company Name – Business name for invoices
• Business Activity – Type of business activity
• Real-time Validation – Instant error messages for invalid VAT format
• Smart Field Visibility – Fields appear/hide based on invoice/receipt selection
• Uppercase Conversion – Auto-convert to CAPITALS (AADE requirement)
• Mobile Responsive – Works perfectly on all devices

WooCommerce Block (Gutenberg) Checkout Support

Full support for the new WooCommerce Block-based Checkout using the official Additional Checkout Fields API:

• Block Checkout Compatible – Works with the Gutenberg-based checkout page
• Checkout Type Selection – Choose between Classic or Block checkout in admin settings
• Field Position Control – Place invoice fields in the Contact Information or Order section
• Conditional Visibility – Invoice fields dynamically show/hide in block checkout just like classic
• Native Admin & Email Display – Fields appear automatically in order details and emails via WooCommerce’s built-in rendering
• Server-side Validation – VAT, DOY, Company, and Activity validated on the server when invoice type is selected

Admin Settings

• Enable/Disable invoice selection feature
• Checkout type: Classic checkout or Block (Gutenberg) checkout
• Field position for classic checkout (10 positions available)
• Field position for block checkout (Contact Information or Order section)
• Uppercase conversion toggle
• Beautiful, modern admin interface with gradient styling

Coming Soon Features

Future versions will include:

• 🔍 AADE Integration – Real-time VAT validation via AADE API with auto-complete
• 🇪🇺 VIES Validation – EU VAT number verification
• 📄 PDF Invoice Generation – Professional invoice PDFs with email delivery
• 💰 VAT Exemptions – Article 39α, VIES-based EU, and non-EU export exemptions
• 📊 Invoice Numbering – Automatic invoice numbering with annual counter
• 📧 Email Integration – Custom email templates and automatic sending

Support development to help prioritize these features! Donate via PayPal

Fully Translated

• Greek (Ελληνικά) – Native language support
• English – Full English translation

Privacy & Security

• No external API calls in current version
• Data stored locally in WooCommerce order meta
• GDPR compliant
• No third-party tracking
• Proper input sanitization and validation

⚠️ Important Notice

This is a free, open-source plugin provided “as is” without any warranty of any kind. By installing or updating this plugin you accept full responsibility for any outcome.

Before installing or upgrading on a live/production site:

1. Always test first on a staging or clone environment — Never install or update directly on your production shop without testing first.
2. Create a full backup — Back up your database and files before any plugin installation or update.
3. Verify checkout functionality — After updating, place a test order to confirm everything works correctly.

The author(s) assume no liability for any issues, data loss, lost revenue, or disruptions caused by this plugin. Use at your own risk.

Developer

Theodore Sfakianakis (irmaiden)

• GitHub: https://github.com/TheoSfak
• Email: theodore.sfakianakis@gmail.com
• Donate: https://paypal.me/TheodoreSfakianakis

Support

• Bug Reports: GitHub Issues
• Questions: GitHub Discussions
• Email: theodore.sfakianakis@gmail.com

Made with ❤️ in Greece 🇬🇷

Method 1: WordPress Admin (Recommended)

1. Go to Plugins → Add New
2. Click “Upload Plugin”
3. Choose the downloaded ZIP file
4. Click “Install Now”
5. Activate the plugin

Method 2: FTP Upload

1. Extract the ZIP file
2. Upload greek-vat-invoices-for-woocommerce folder to /wp-content/plugins/
3. Go to Plugins menu and activate

After Activation

1. Go to WooCommerce → Settings → Ελληνικά Τιμολόγια
2. Enable Invoice Selection
3. Select your Checkout Type (Classic or Block)
4. Configure field position based on your checkout type
5. Enable Uppercase Conversion (recommended for AADE compliance)

1. 

   Checkout page with Invoice/Receipt selection

2. 

   Invoice fields (ΑΦΜ, ΔΟΥ, Company Name, Activity)

3. 

   Real-time VAT validation

4. 

   Admin settings page

1.2.3 (2026-09-12)

• Fixed two PHP notices on newer WordPress/WooCommerce versions: “Function _load_textdomain_just_in_time was called incorrectly” (WordPress 6.7+) and “Function woocommerce_register_additional_checkout_field was called incorrectly” (WooCommerce 11.0+). Both traced to Block Checkout field registration running on the woocommerce_blocks_loaded hook, which fires before init; it now runs on woocommerce_init instead, as WooCommerce’s own guidance recommends. No functional change — fields register and behave identically, just without the notices.

1.2.2 (2026-09-10)

• Clarified the checkout ΑΦΜ “Valid” message: it now explicitly states that only the 9-digit format was checked, not that the number is a real, AADE-registered VAT number. Previously it showed a bare “Valid” for any well-formed 9-digit number, which could be read as a genuine verification.
• Updated the FAQ to state the same thing plainly for store owners evaluating the plugin.

1.2.1 (2026-09-01)

• Fixed Block Checkout: selecting “Απόδειξη” (Receipt) still required Company Name, ΑΦΜ, ΔΟΥ, and Business Activity even though those fields are correctly hidden — the customer could not complete the order
• Hardened the required-fields feature to only apply on WooCommerce 9.9.0+ (needed for per-field conditional requirements); older WooCommerce versions fall back to server-side-only enforcement instead of the client incorrectly treating fields as always required

1.2.0 (2026-08-11)

• Added per-field required/optional settings for invoice fields (Company Name, ΑΦΜ, ΔΟΥ, Business Activity) — all 4 required by default
• Fixed Block Checkout showing Company Name, ΔΟΥ, and Business Activity as “(Optional)” while the server actually required them
• Fixed the uppercase-conversion setting not being saved under the option it was read from
• Updated donate link

1.1.0 (2026-03-13)

• Added WooCommerce Block Checkout support via Additional Checkout Fields API
• Added checkout type setting (Classic / Block) in admin
• Added block checkout position setting (Contact / Order section)
• Added conditional field visibility in block checkout (show/hide based on invoice type)
• Added company name field for block checkout
• Made VAT number (ΑΦΜ) mandatory
• Block checkout fields display natively in admin orders and emails
• Improved code quality and validation

1.0.8 (2025-01-17)

• Simplified plugin for WordPress.org release
• Added real-time VAT validation (9 digits)
• Added numeric-only input filter for VAT field
• Beautified admin settings page with gradient styling
• Added author information and donate button
• Improved checkout JavaScript for better field toggle
• Enhanced mobile responsiveness
• Removed advanced features temporarily (moved to roadmap)
• Updated documentation

1.0.7

• Fixed checkout field toggle functionality
• Improved CSS styling
• Bug fixes and performance improvements

1.0.0

• Initial release
• Basic invoice/receipt selection
• Greek VAT fields (ΑΦΜ, ΔΟΥ)
• Company information fields