Coupons can only be deactivated but not deleted. 

Instructions:

  1. Go to "Coupons" (in Marketing). Use the filters to view by class name, code, or date range (min date to max date). You may use multiple filters to make the job even easier.
  2. Mouse over the coupon that you wish to deactivate. Click on "Edit Coupon" (pencil icon).
  3. In the popup window, navigate to "Expiry Date" and set it to a past date. The date must be entered in this format: DD/MM/YYYY.
  4. Edit your coupon and then save your changes.

Related Articles:

How do I add/edit a coupon?
How do I view the orders that have applied a particular coupon code?

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