When a customer is placing an order through your site, they will only be able to apply one discount code to an order.
I hope this helps! Please feel free to contact us anytime if you have any other questions or concerns.
Dan | Shopify Guru
Patrick, a Shopify Guru here :).
At the moment, it's only possible to add one discount code at a time, this may change in future but I don't have a timeline for when that would happen. What type of discounts are you looking to apply to the checkout?
Thanks for your answer.
This is so little transparency :(
I really appreciate the support overall, but you should really consider a public feature requests system.