I’m looking for a simple extension, but I can’t seem to find it. I need an option on checkout to enter a “Referral Code”, right by the coupon code box. That code simply needs to be referenced in the order and related invoices. That’s it. Everything else will be done by the website administrator.
Does this exist? All I can find are complicated affiliate modules that deal with emails, tracking cookies and account registrations (we only use guest checkout).
Any help is appreciated.. Thanks