Guys, the possibility of using promotional codes for existing customers is really an option, in many SMS this opportunity is implemented, and you cannot integrate in billing in 6 years, this question was raised - https://requests.whmcs.com/topic/promotions-on-renewals. According to your logic, it turns out that new customers can use the promotion when ordering by entering a promotional code, but an already registered customer cannot, although the service is the same.
I think many people will support me in this, right?
Voting thread: - https://requests.whmcs.com/topic/promotions-on-renewals
other branches with similar themes:
https://requests.whmcs.com/topic/apply-promotion-code-to-renew-hosting-domain-etc-
https://requests.whmcs.com/topic/promotions-on-renewals
https://requests.whmcs.com/topic/promo-code-to-extend-product-period
https://requests.whmcs.com/topic/extend-promo-code-period
https://requests.whmcs.com/topic/promotion-for-existing-users-with-active-product
https://requests.whmcs.com/topic/promotional-code-invoice
https://requests.whmcs.com/topic/allow-promotional-codes-to-extend-the-life-of-a-service