Articles on: Synctrack - Returns & Exchanges

How to connect with PostNL?

Overview

Synctrack Returns now connects directly with PostNL. If you ship with PostNL — typically in the Netherlands and Belgium — you can link your PostNL business account with your API credentials and generate return labels + tracking right inside the return flow. PostNL was previously only reachable through the Sendcloud aggregator; now it's a direct integration, so you no longer need a third-party platform in between.

Step 1: Get your PostNL API credentials

Go to the PostNL Portal and log in to your business account.

Navigate to API Management.

Copy your Customer Code, Customer Number, and Production API Key.

You need a PostNL business account with API access. If you don't see API Management, contact PostNL to enable API access for your account.

Step 2: Connect PostNL in Synctrack Returns

In your Synctrack dashboard, go to Settings > Shipping & Delivery > Logistics integration and click Connect on PostNL.

Paste the Customer Code, Customer Number, and Production API Key you copied from PostNL into the matching fields.

Click Connect. When the credentials are valid, PostNL shows as Connected and you're ready to create labels.

Make sure you copied the Production API Key (not a sandbox/test key), so the labels you create are valid for live shipments.

Step 3: Create a return label with PostNL

Approve a return request in Return management and choose PostNL as the return provider.
Synctrack generates the PostNL return label + tracking and stores them on the return, so your customer can ship the item back.

For more info on how to create and print return labels, click here

Who can use this feature?

Available to Synctrack Returns merchants who use PostNL for return shipping — typically stores in the Netherlands and Belgium. It works like the other courier integrations, with no extra plan gate.

Updated on: 15/07/2026

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