If your discount isn’t applying consistently, the issue may be with the format of your discount code — specifically if it includes spaces or special characters (like %).
What’s happening
Some discount codes that include:
spaces (e.g.,
SUMMER SALE)special characters (e.g.,
%,#,&)
can behave unpredictably when used with ADU.
This means the discount might:
apply sometimes
fail other times
appear inconsistent across customers or sessions
Why this happens
ADU relies on matching discount codes exactly as they’re passed through the storefront.
Special characters and spaces can:
be interpreted differently by browsers or scripts
break formatting when passed between systems
cause mismatches during validation
Recommended fix
To avoid this issue, we recommend using simple, clean discount codes:
✅ Use:
letters and numbers only
no spaces
no special characters
Examples:
SUMMER10WELCOME20SALE2026
❌ Avoid:
SUMMER SALESAVE 10%DEAL#1
What you should do
Go to your Shopify Admin
Edit your existing discount code
Replace it with a simplified version (no spaces or symbols)
Test the discount on your storefront
Need help?
If you’ve updated your discount code and the issue still happens, reach out to our support team with:
your discount code
a sample product
a screen recording (if possible)
We’ll take a closer look and help you get it working smoothly.