Registration field at order details

Hi,

Having it in the address table would allow you to directly add a tag in the "addres format" setting of the HikaShop configuration in order to display the content of the field with the rest of the address.

Adding the display of a custom user field to the order details page is possible too, but it's a bit more complex. You need to edit the view file where you want to add it, and add the necessary code.
Here is the documentation page on how to find which view file to edit :
www.hikashop.com/support/documentation/1...-display.html#layout
If could provide a screenshot of the settings of the custom field and a screenshot indicating where you want to display that custom field, we should be able to provide a more precise answer.