About this plugin
hu, automatically generating professional invoices when orders are paid.
External Services
hu invoice generation service to create and manage invoices for FluentCart orders.
Service Information:
hu)
hu’s Agent API to automatically generate invoices, fetch taxpayer information from the Hungarian Tax Authority (NAV), and retrieve generated invoice PDFs.
Data Transmission:
hu/szamla/ when:
-
Generating Invoices (when an order is marked as paid):
- Your Számlázz.hu Agent API Key
- Order information: order number, dates, amounts, currency
- Buyer information: name, email, address, postal code, city, country
- Buyer’s VAT/tax number (if provided)
- Product details: names, quantities, prices, VAT rates
- Shipping information: title, amount, VAT rate
- Invoice settings: language, type (paper/electronic)
-
Fetching Taxpayer Data (when a Hungarian VAT number is provided):
- Your Számlázz.hu Agent API Key
- The taxpayer’s 8-digit tax identification number (truncated from the full VAT number)
-
Downloading Invoice PDFs (when users click to download invoices):
- Your Számlázz.hu Agent API Key
- The invoice number
Legal Information:
hu/aszf/
hu/adatvedelem/
hu. ).
Key Features
- Automatic Invoice Generation – Invoices are automatically created when orders are marked as paid
- Download Invoices – Every receipt download button is overriden with Számlázz.hu invoice download.
- Multi-language Support – Generate invoices in 11 languages: Hungarian, English, German, Italian, Romanian, Slovak, Croatian, French, Spanish, Czech, Polish
- Invoice Types – Choose between Paper Invoice and E-Invoice formats
- VAT Number Validation – Automatically fetches company data from NAV (Hungarian Tax Authority) when VAT number is provided
- Customizable Settings – Configure invoice language, type, quantity units, and shipping details
- Shipping VAT Management – Easily set and apply VAT rates for shipping
- Cache Management – Built-in cache system with easy cleanup
- Bilingual Admin Interface – Full support for English and Hungarian languages
- Subscription Support – Automatically generates invoices for subscription renewals
Requirements
- WordPress 5.0 or higher
- FluentCart plugin installed and activated
- Active Számlázz.hu account with Agent API Key
- PHP 7.4 or higher
Important Warnings
Before using this plugin in production:
- Enable Test Mode in both FluentCart and Számlázz.hu
- Generate test invoices to verify everything works correctly
- Consult with your accountant to ensure the plugin meets your accounting requirements
- Review all generated invoices for accuracy
- Test all edge cases relevant to your business
This plugin generates official accounting documents. Incorrect invoices can have legal and tax implications.
API Usage Costs
hu charges for API usage. hu Agent API to generate invoices automatically, which is a paid service. hu pricing before enabling automatic invoice generation.
Limitations
- VAT Rates: Only explicit rates supported (0%, 5%, 18%, 27%). Named VAT keys (AAM, TAM, TEHK) are not supported.
- Document Types: Only Invoices can be generated. Receipts and Pro forma invoices are not supported.
- IPN: Instant Payment Notification is not yet supported.
- Lag: Customers might need to wait a few seconds on the order conrifmation page before being able to download the invoice.
- Shipping VAT: FluentCart shipping VAT may contain minor rounding errors. This is a known bug in FluentCart, which will be corrected in the following releases. The shipping VAT on the invoice is calculated correctly according to Hungarian legal regulations. This may cause a small difference (fraction of a Forint) between what the customer pays, and what appears on the invoice.
Language Support
The admin interface is available in:
* English (Default)
* Hungarian (Magyar)
The interface language follows your WordPress language settings.
Configuration
- Navigate to Settings > Számlázz.hu
- Enter your Számlázz.hu Agent API Key ( How to get API key )
- Configure invoice settings:
- Invoice Language (default: Hungarian)
- Invoice Type (Paper Invoice or E-Invoice)
- Quantity Unit (default: “db”)
- Shipping Title (default: “Szállítás”)
- Shipping VAT Rate (default: 27%)
- Save settings
Additional Information
Troubleshooting for advanced users
Enable WP_DEBUG to see debug information on each orders activity log.
Support
For general questions, please visit the plugin website.
Bug reports and feature requests can be submitted on the project’s GitHub page.
Contributing
This plugin is open source. Contributions are welcome!
Credits
- Author: Gábor Angyal
- Website: webshop.tech