[pino_xcart]

Hi,

The following patch should do the trick:

Index: src/classes/XLite/Module/CDev/Coupons/Model/Repo/Coupon.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- src/classes/XLite/Module/CDev/Coupons/Model/Repo/Coupon.php    (revision 0ccac487726f63245ce987723148dcef1575ca44)
+++ src/classes/XLite/Module/CDev/Coupons/Model/Repo/Coupon.php    (date 1559578157000)
@@ -91,7 +91,7 @@
     protected function defineFindOneByCode($code)
     {
         $queryBuilder = $this->createQueryBuilder('c')
-            ->andWhere('COLLATE(c.code, utf8_bin) = :code')
+            ->andWhere('LOWER(COLLATE(c.code, utf8_bin)) = LOWER(:code)')
             ->setParameter('code', $code);
 
         return $queryBuilder;

Originally Posted by CCP

Is it possible to change Coupon codes to be case-insensitive?

We have a fair number of clients who complain that they can't enter the codes, when it turns out they aren't typing them in ALLCAPS.