I know that I can pass an ID to my order form URL and use code on the page to copy the ID from the URL and save it into a field, but is there an order form field that I can save this unique ID to? My goal is to be able to save a unique ID passed into each order form and save it with each order. I will then use an HTTP post to send this unique ID back to me wentever a recurring order is processed.
Can anyone help?