Hi,
Thanks for the information. I realise that I’d left out the fact that we are using the GraphQL implementation (https://github.com/wp-graphql/wp-graphql-woocommerce) which utilises the same data model as the Woo API.
But, your response helped me understand that you’re referring to a POST variable which needs to be sent along with the request. It’s a bit awkward to implement, as ideally it could be done via the GraphQL mutation directly, but it’s possible to also send the expected POST var as well – which seems to be working.
Thanks for your help
Pete