About this plugin
This plugin synchronizes WooCommerce orders with Merit Aktiva accounting software. A sales invoice is automatically created in Merit Aktiva for every new paid order — no manual work required.
Requires at least the Merit PRO package.
Features
- Automatic invoice creation in Merit Aktiva for every new WooCommerce order (cron, every 5 minutes)
- Manual synchronization from the admin panel
- Estonian banking reference number generation (7-3-1 algorithm) with configurable prefix
- B2B support: company name, Estonian business registry code (validated) and VAT number at checkout
- B2C support: private customer name and contact details
- Payment method mapping (WooCommerce payment method → Merit Aktiva payment code)
- Automatic credit invoice when an order is fully refunded
- Invoice PDF download directly from Merit Aktiva within the WC order view
- Invoice reconciliation: detect discrepancies between WC and Merit Aktiva
- Sync history log with pagination
- API connection test in settings
- Settings export and import (JSON)
- WooCommerce HPOS (High-Performance Order Storage) support
- Toast notifications for sync results (top-right corner, disappear after 5s)
External Services
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Data transmitted:
* API authentication (ApiId, timestamp, HMAC-SHA256 signature)
* Invoice data: customer name, address, email, phone number
* Product codes, descriptions, quantities, prices, VAT
* Reference number (Estonian 7-3-1 standard), invoice number, payment due date
Data is transmitted every time an invoice is sent (automatically or manually).
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Requirements
- WordPress 6.7 or newer
- WooCommerce 8.6 or newer
- PHP 8.0 or newer
- Merit Aktiva account with API access (PRO package or higher)
Configuration
API Settings:
* API ID and API Key — from your Merit Aktiva account
* Reference number prefix — prepended to the reference number (digits only)
* Payment deadline in days
* Contact person — displayed on the invoice
Payment Method Mapping:
g. “Bank Transfer” → “T”).
Business customers at checkout:
Customers can check “I am a company”, enter a business registry code and VAT number. The registry code is validated using the Estonian business registry algorithm (mod-11).
Usage
Orders are synchronized automatically every 5 minutes. For manual sync:
* All orders: Merit Aktiva Sync → Settings → “Sync all orders”
* Single order: WooCommerce → Orders → open order → “Send invoice to Merit Aktiva”
Support
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