WooCommerce for Sellsy

Supported workflows

Orders into invoices

Each order is automatically converted into an invoice.

Orders into estimates

Convert your orders into estimates, with draft, validation and signing.

Orders into sales orders

Generate a sales order document for each store order.

Delivery notes

Issue a delivery note alongside each order.

Refunds into credit notes

Refunds automatically generate a credit note linked to the original invoice.

Customer sync

Customers are created or reconciled automatically by email.

Product sync

Products are matched to your catalog by reference, and created when missing.

Payment sync

Payments collected on your store are recorded against the document.

Invoices by email

Send finalized invoices to your customers by email automatically.

Stock updates

Keep stock levels in sync between your store and your invoicing software.

Overview

This integration lets you automatically sync your WooCommerce orders to Sellsy, turning your e-commerce orders into invoices, estimates, purchase orders, or delivery notes depending on your needs.

Key features

Real-time synchronization: New orders are retrieved instantly
Smart reconciliation: Existing customers and products are automatically linked
Tax management: WooCommerce tax information is preserved
Configurable workflows: Choose which document types to create in Sellsy
Multi-store support: Compatible with multiple WooCommerce configurations

Installation

Create your account on Order Invoicer
Log in to your customer area

Note: Signing up is free and lets you test the integration.

Create a new connector

In your dashboard, click "Add a connector"
Select "WooCommerce" as the e-commerce platform
Select "Sellsy" as the invoicing software
Click "Create connector"

Important: This step creates the foundation of your integration. You can change the settings later.

Configure WooCommerce

Your store URL: Enter the full URL of your WooCommerce (e.g. https://your-store.com)
Consumer Key: Enter the consumer key generated in WooCommerce
Consumer Secret: Enter the consumer secret generated in WooCommerce
Click "Test connection" to verify access
Click "Save" to confirm the configuration

Verification: Make sure the URL ends with your domain (with no trailing /).

Configure Sellsy

It is strongly recommended that the user configuring this step be an administrator of the Sellsy account, so that they automatically have all the permissions required by the connector.

Otherwise, please make sure the collaborator's privilege profile has at least the following permissions:

Clients / Client visibility level: All
Clients / Create clients
Contacts / Contact visibility level: All
Contacts / Create contacts
Invoicing / Access to the Invoicing module
Invoicing / Invoice visibility level: All
Invoicing / Create invoices
Invoicing / Validate invoices
Invoicing / Credit note visibility level: All
Invoicing / Create credit notes
Invoicing / Validate credit notes
Invoicing / Purchase order visibility level: All
Invoicing / Create purchase orders
Invoicing / Allow creating purchase orders for a client with an overdue invoice
Invoicing / Template visibility level: All
Invoicing / Allow adding simple lines to documents
Catalog / Create products and services
Catalog / Edit products and services
Catalog / Manage variants

View privilege profiles on Sellsy

Click "Connect Sellsy" and accept the permissions.

Note: The Sellsy configuration is the same for all e-commerce platforms.

Enable your workflows

Once the Sellsy app is installed, you will be redirected automatically to this step.

Pay attention to the start date of your flows (by default, the date the connector is configured).

We recommend generating "drafts" rather than finalized invoices during the testing phase.

You can configure:

The document owner (by default, the user who configured Sellsy)
A document template
A pricing category

Missing a setting you consider essential? Please contact us by email at contact@orderinvoicer.com.

You must enable at least one flow to move on to the next step.

Recommended workflows for WooCommerce

Workflow 1 - Invoice creation (Recommended)

Automatically converts orders into Sellsy invoices
Configurable triggering based on order status
Automatic sending of invoices by email

Workflow 2 - Purchase order creation

Pushes orders to Sellsy as purchase orders
Useful for stock management and preparation

Workflow 3 - Estimate creation

Converts orders into Sellsy estimates
Ideal for orders pending validation

Workflow 7 - Delivery note creation

Automatically generates delivery notes
Perfect for logistics and shipping

Activate your subscription

For now, please contact contact@orderinvoicer.com to activate your subscription.

Note: We offer different plans tailored to your order volume.

Verify the conversion of your orders

Conversions are performed instantly (a few minutes' wait at most).

Automatic reconciliation

Customers

Customers already present in Sellsy are automatically reconciled by email
New customers are automatically created in Sellsy
Contact information is preserved

Products

Products already present in Sellsy are automatically reconciled by reference (Sellsy) and SKU (WooCommerce)
New products are automatically created in Sellsy
Price and stock information is synchronized
Important: The SKU must contain at least 2 characters to be synced

Taxes

Tax information is retrieved from WooCommerce
Please make sure it is configured correctly in WooCommerce
VAT rates are preserved in Sellsy

If you use the WooCommerce Price Based on Country plugin, disable the "Round to nearest" option in the pricing zone settings. This option creates amount discrepancies between WooCommerce and Sellsy invoices. See the WooCommerce installation documentation for more details.

Advanced configuration

Synchronization settings

Synchronization frequency

New orders: Instant (webhook)
Updates: Every 5 minutes
Manual synchronization: Available from the dashboard

Error handling

Orders in error are flagged in the dashboard
Reconversion attempts are automatic
Error logs are available for diagnosis

Workflow customization

Trigger conditions

You can configure when to trigger each workflow:

Order confirmed: As soon as the order is validated
Order paid: After payment is received
Order shipped: After the shipping status is updated
Order completed: Once the order is finalized

Status mapping

Configure the mapping between WooCommerce and Sellsy statuses:

WooCommerce → Sellsy
Pending → Draft
Shipped → Shipped
Completed → Finalized

Multi-store configuration

If you use WooCommerce in multi-store mode:

Create one connector per store: Each store requires its own configuration
Separate API keys: Use different API keys for each store
Custom workflows: Adapt the workflows to the needs of each store

Integration with plugins

Payment plugins

Order Invoicer is compatible with the main WooCommerce payment plugins:

Stripe
PayPal
Square
And many more...

Shipping plugins

Shipping information is preserved
Shipping fees are included in invoices
Shipping methods are synchronized

Troubleshooting

Common issues

Synchronization is not working

Check that the API keys are correct
Make sure WooCommerce is active
Check the API user's permissions

Customers not reconciled

Check that the emails match between WooCommerce and Sellsy
Make sure the customers exist in Sellsy
Check the case of the emails

Products not reconciled

Check that the references/SKUs match
Make sure the products exist in Sellsy
Check the reference configuration

Tax errors

Check the tax configuration in WooCommerce
Make sure the VAT rates are correct
Check the tax rule configuration

Webhooks not working

Check that WordPress permalinks are configured
Temporarily disable security plugins
Check the web server configuration
See the dedicated WooCommerce and Sellsy webhooks page (status in the app, empty log, Sellsy)

Logs and diagnostics

Accessing the logs

In your dashboard, go to "Settings"
Click "Logs"
Review the errors and warnings

Diagnostic information

Last synchronization: Time of the last retrieval
Pending orders: Number of orders being processed
Recent errors: Details of the most recent errors
Webhook status: State of the WooCommerce webhooks

Best practices

Data preparation

Before the first synchronization

Check that your Sellsy customers have valid emails
Make sure your Sellsy products have unique references
Check the tax configuration

Ongoing maintenance

Regularly monitor the error logs
Check the quality of the synced data
Test the workflows after updates

Performance

WooCommerce optimization

Keep your WordPress and WooCommerce up to date
Optimize your WordPress database
Use a cache to improve performance

Sellsy optimization

Organize your products with clear references
Keep your customers up to date
Use document templates to standardize

Security

API key management

Change your API keys regularly
Use clear descriptions for your keys
Disable unused keys
Monitor the use of your API keys

HTTPS configuration

Use HTTPS for all communications
Check that your SSL certificate is valid
Configure HTTPS redirects correctly

Support

Help resources

Documentation: See this documentation for common questions
Technical support: Contact contact@orderinvoicer.com for assistance
Community: Join our user community

Contact

Email: contact@orderinvoicer.com
Response: Within 24h on business days
Emergencies: Priority support for active customers

Order metadata

Order Invoicer automatically adds metadata to your WooCommerce orders to maintain traceability with Sellsy.

Metadata added

Each processed order receives meta_data containing the URLs of the documents generated in Sellsy:

orderinvoicer.invoice_url - Sellsy invoice URL
orderinvoicer.order_url - Sellsy purchase order URL
orderinvoicer.estimate_url - Sellsy estimate URL
orderinvoicer.creditnote_url - Sellsy credit note URL
orderinvoicer.delivery_url - Sellsy delivery note URL
orderinvoicer.proforma_url - Sellsy proforma document URL

Accessing the metadata

In the WordPress interface:

Go to WooCommerce > Orders
Click a processed order
In the Custom Fields tab, you will see the Order Invoicer metadata

Through the REST API:

GET /wp-json/wc/v3/orders/{id}

Through PHP:

$order = wc_get_order($order_id);
$invoice_url = $order->get_meta('orderinvoicer.invoice_url');

Learn more: See our full documentation on metadata for more details.

Configuration

You can change the connector settings at any time through your Order Invoicer dashboard.

Note: Configuration changes are applied immediately for new orders.