I want to add a tag to customer *orders* based on the link they use to access our website. I don't want to tag the customer, just the order. That will enable me to know where to drop the order (I have different drop sites). The tag will have the name of the drop site.
I want to assign orders to sites and not have customers choose their own at checkout. I don't even want them to see site options as some are private. Instead, I want to automatically assign them to a pickup site based on what email link they use.