Navigate to Inventory → Configuration → Delivery Methods and select "Canada Post Shipping" to open the carrier settings.

Enter your Canada Post API credentials: Customer Number, API Username, API Key, Contract ID, Origin Postal Code, and choose label format (PDF/ZPL/PNG).

Click "Test Connection" to verify your credentials. A green success notification confirms the API keys are valid before going live.

Set the product weight (e.g. 1.50 kg) on the product form. Canada Post rates are weight-based, so accurate weights are required for correct pricing.

Create a sale order with a Canadian shipping address. The customer's postal code is used to calculate Canada Post rates at checkout.

Click "Add Shipping" on the sale order and press "Get Rate" to fetch live Canada Post pricing for the destination address.

Canada Post returns the best available rate (e.g. $36.15 CAD Expedited Parcel). A warning lists all available services so you can choose the most suitable option.

The Canada Post delivery charge is automatically added as a line item on the confirmed sale order, ready for invoicing.

The generated delivery order (WH/OUT) shows "Ready" status with all products packed and the Canada Post carrier assigned.

After validating the delivery, the shipping label PDF appears directly in the chatter with the Canada Post tracking number attached.

A "Return" button appears on the validated delivery order, allowing you to initiate a Canada Post return shipment with one click.

The system creates a return receipt (WH/IN) with the Canada Post carrier preserved, ready to generate the return label on validation.

Validating the return picking automatically generates and attaches the Canada Post return label PDF to the chatter, with its own tracking number.

The outbound shipping label shows the service name (Expedited Parcel / Colis accélérés), barcode, and full recipient address in the standard Canada Post format.

The return label displays your warehouse address as the destination, complete with barcode and Canada Post branding — ready to include in the parcel.

Canada Post rates appear live on your website checkout page, letting customers select and pay for their preferred Canada Post service at time of purchase.