Thanks for the information, I have tested these and confirmed this behavior. Unfortunately credit control has not been implemented through API. This functionality uses logic in the web interface that is not yet available for API.   I understand this wish is taken into consideration for future releases, but there is no timeframe or confirmation for it yet. Hopefully you can find alternative methods for this. ... View more

I see, my bad. I mixed up the backslash with the / character. You are correct, it is not possible to use backslash in GUI either. Thank you for the help 🙂   ... View more

We don't have information on this at the moment. The team has been informed about expanding the function of the endpoint, and we'll keep the community updated as more information is available.  ... View more

If it's only the first request, then I'd recommend debugging the payload to see what values constructed in the payload for the first object created from the excel data.  ... View more

Hi Stian, I see. Have you tried sending a PUT request ?  "vatId": { "value": null }, ... View more