Discount code not applying at checkout

Why this happens

Because the public validation POST /api/coupons/public/validate checks code, dates, eligibility, and limits together, and any single failing condition blocks application. Dashboard changes such as pausing or narrowing products reflect immediately on new orders.

What Vareons does about it

Vareons surfaces the validation rejection reason, and offers a fix path from /dashboard/discounts by reviewing code, dates, minimum, products, and usage, then Save and retry checkout, with /dashboard/discounts/[id]/history showing who changed the rule and when.

• discounts.coupons.supported — Discount codes (coupons): Available
• discounts.validity.auto-expire — Discount validity and auto-expiry: Available

Limitations

The current facts registry does not claim automatic prevention of every rejection; some cases need broader conditions or a new coupon instead of editing an expired one.