PostNL

Authentication

The PostNL credentials can be found at Mijn PostNL. Go to PostNL documentation for more information.

Field	Description
Customer number	Customer number ("klantnummer")
Customer code	Customer code ("Klantcode")
API Key	Go to API management to get your API Key. Make sure to copy the production key.
Antwoordnummer	Only required for Antwoordnummer return product.

Merchants can only use this integration if they have a direct PostNL contract.

Integration	Return product	Service type	Product code	Tracking
PostNL	Returns to a Business reply number (Antwoordnummer)	Label, Smart Returns (printless)	2285	✅
PostNL	Antwoordnummer Printless	Printless	-	✅
PostNL	Returns to a home address	Label, Smart Returns (printless)	3285	✅
PostNL	Label in the box (Single label variant)	Label	3250	✅
PostNL	Mailbox Parcel	Label	-	✅
PostNL	Brievenbuspakketjes*	Label	-	✅

*Brievenbuspakketjes is available only via Returnista's contract.

A printless version of the Antwoordnummer service that allows customers to return items without printing a physical label.

A service for small parcels that can be delivered to mailboxes, providing convenient return options for customers.