Scenario

You have enrolled in the Amazon Seller Flex program, and would like to set it up in Linnworks.

Solution

Setting up Amazon Seller Flex in Linnworks requires completing the following steps:

1. Enabling the Amazon Seller Flex order download and inventory sync 
2. Syncing Inventory levels with Seller Flex SKUs 
3. Adding and configuring the Amazon Smart Connect shipping integration 
4. Downloading the Amazon SellerFlex order into Linnworks 
5. Producing a shipping label through the new integration 
6. Processing the order 

Background

How Amazon SellerFlex orders are downloaded into Linnworks

Amazon Seller Flex orders are handled differently from MFN (Merchant Fulfilled Network) orders and follow a dedicated download flow. 

When FBA is enabled in your Amazon channel

• Seller Flex orders initially download into the FBA location
• Orders then move automatically to the designated Seller Flex location

• During this move, the order:

  • Receives Paid status

  • Becomes Unparked

  • Is assigned a ShipmentId order extended property

When FBA is not enabled

• Seller Flex orders download alongside MFN orders
• Required Seller Flex attributes (including ShipmentId) are still assigned automatically

Setting up Linnworks with SellerFlex

1. Enabling the Amazon Seller Flex order download and inventory sync

• Go to Settings > Channel Integration and open the Amazon channel config (pencil icon).
• Scroll down to the SmartConnect section and click the Enable Multi-location button. Confirm your selection and save changes.
  • If Enable Multi-location button is not visible under SmartConnect, contact Linnworks Support to enable access.
• Open the Channel location mapping (warehouse icon).
• Create a new location for SmartConnect by clicking +Add New.
  
  • Change the Location Type from Delivery to SmartConnect
  • Enter the 4-character Seller Flex Warehouse ID into the Channel Location ID field (example: ABCD)
  • Enable the Linnworks locations you want to sync stock levels from to SellerFlex under Sync inventory from locations.
  • Select the Order download location that Seller Flex orders will move to.
  • Click OK to save.

• Re-open the Amazon config and tick the boxes next to Seller Flex Enabled and Inventory Sync Enabled:
• Ensure that the "Despatch notes" are also enabled (required to mark orders as Shipped)
• Save the changes.

2. Syncing Inventory levels with Seller Flex SKUs

To submit inventory levels to Amazon Seller Flex, each Channel SKU must be linked to a Linnworks SKU.

• Open the Channel Mapping screen and search for the SellerFlex SKU (left side)
• Search for the Linnworks SKU (right side)
• Select both and click "Link"
• Click the "table icon" and disable the "Ignore Sync" setting for the SmartConnect Location
  • 
• Additionally, Review "Max Listed" and "End When" fields and override if channel-level rules apply.

Once linked, update stock on the Linnworks SKU to trigger the next inventory sync.

Multi-Box ASINs

• Multi-Box ASINs must be linked to a Composite Parent in Linnworks
• The composite must include:
  • At least 2 children, or
  • 1 SKU with quantity 2
• This ensures Amazon returns the correct number of shipping labels

Bulk linking can be done using the SKU Linking import.

3. Adding and configuring the Amazon Smart Connect shipping integration

The Amazon Smart Connect integration connects Linnworks to the Amazon Seller Flex backend, allowing you to generate shipping labels.

    3a. Add the shipping integration.

1. Go to Shipping > Integrations > +Add integration > Amazon Smart Connect > Integrate
   • If Amazon Smart Connect is not listed, contact Linnworks Support to enable access.
2. Enter a friendly name in the Account Name field to identify the Seller Flex integration.
3. From the dropdown, select the Amazon channel integration, where Seller Flex order sync has been enabled.

        4. Click on the Seller Central sign-in link and authorise Linnworks Shipping.

        5. When you see a confirmation message, the account has been authorised successfully. Close the window.

6. Return to the Linnworks registration wizard and click Next. You should see a message confirming successful completion.

    3b. Configure the shipping service.

1. Open the Services list and add Amazon Auto Select.

        2. Optionally, rename the service to something more meaningful, e.g., Amazon Seller Flex.

        3. Click Finish.

    3c. Configure printing settings.

1. Open the Printer config

        2. Select the required Virtual Printer and label format.

        3. Save changes.

4. Downloading the Amazon SellerFlex order into Linnworks

Orders may take up to 30 minutes to download into the system.

When the payment information is received from Amazon, the orders will automatically:

• Receive an Amazon SmartConnect Order identifier: More details and an order extended property called ShipmentId
• Move into the location specified in the Channel location mapping in a Paid and not parked status
• Become Ready to Process

5. Producing a shipping label through the new integration

When a Seller Flex order is ready to ship (i.e., has the ShipmentId order property assigned, and is visible in the mapped location), allocate the newly created shipping service:

1. Right-click the order > Shipping > Change service > Amazon Smart Connect > select service.

Note: This allocation can be automated for future orders by following these steps.

        2. Ensure that the order has accurate weight and dimensions assigned, as these values will be sent to Amazon. 

Note: Heavy or bulky items should have a weight of at least 23 kg and/or the length of at least 175 cm.

Single-Box SKUs

Once the above is done, print the shipping label as usual: use a hot button, the Despatch Console, or right-click > Print > Shipping label

Multi-Box SKUs

Before you generate a shipping label, assign split packaging to the order if it contains a Multi-Box ASIN (this must first be set up in Amazon, and mapped to a composite in Linnworks).

The number of packages specified in Linnworks must match the number configured in Amazon, as this determines the number of labels Amazon returns.

Once the split packaging is assigned and each package has a weight and dimensions, print the shipping label as usual: use a hot button, the Despatch Console, or right-click > Print > Shipping label

6. Processing the order

Processing the order in Linnworks will mark it as Shipped on Amazon, provided "Despatch notes" are enabled in the Amazon channel configuration.

Additional information

• Integrating Amazon Smart Connect shipping integration.
• Automating the Amazon Seller Flex service allocation
• Interest form