There are a few reasons a Discount Code might not work:
- it's been deleted
- it is only valid for a certain product or specific products
- it has run out of uses
- the discount code is only valid between certain dates
To figure out why your Discount Code is not working, I recommend you check the Discount Code Settings, find your Discount Code and click Edit
Deleted/Out of uses
These two are pretty self-explanatory
- If you cannot find the discount code in your Settings, it means that it has been deleted by a staff member
- it has run out of uses - e.g you might have set it to be valid 3 times per person and they've used it 3 times
It is only valid for a certain product or specific products
Check under Discount Amount, if it set to a specific item(s), which items have been selected for the Discount to apply to