How can I prevent stacking discounts on my eCommerce site?

[Karitas]

Hi hi, I really need help with discount problem. 

When people go into my website they can sign up for 15% discount code if they sign up for an email list.

Now I am goint to have a 20% discount on one collection but I don´t want the people to use the 15% code on top of that, so they do not get 35%. How can I do this?

And I want the 20% discount to show on the product/collection, not only at the cart. 

If anybody can help be that would be great 🙂 

[Trevor]

@Karitas 

Discount codes can't be stacked, so your customers would need to choose one or the other. 

However; if you want to have the discount appearing on each product, wherein the old price is crossed out, and the "sale" then you'll need to edit your 15% welcome discount to exclude the sale products. You can find more information on how to create and edit discount codes here. 

To update your product pricing, you can manually add the compare at pricing, then the sale price within the admin, or you can export your products to CSV and update the respected columns, then import the CSV, choosing to overwrite the existing products so the pricing can update. 

Alternatively, you can use a discount app to help you manage the discounts.