diff --git a/src/QUI/ERP/Coupons/CouponCode.php b/src/QUI/ERP/Coupons/CouponCode.php
index 2a88c57b192be86b1960bcc4a7ef869d2784592b..038cd06fef09e1109777381e03ad9a32d1df082a 100644
--- a/src/QUI/ERP/Coupons/CouponCode.php
+++ b/src/QUI/ERP/Coupons/CouponCode.php
@@ -2,11 +2,22 @@
 
 namespace QUI\ERP\Coupons;
 
+use DateTime;
+use Exception;
 use QUI;
 use QUI\ERP\Discount\Handler as DiscountHandler;
 use QUI\ERP\Order\OrderInterface;
 use QUI\Permissions\Permission;
 
+use function array_key_first;
+use function count;
+use function current;
+use function in_array;
+use function is_array;
+use function is_null;
+use function json_decode;
+use function method_exists;
+
 /**
  * Class CouponCode
  */
@@ -80,7 +91,7 @@ class CouponCode
      *
      * @var bool
      */
-    protected $valid = true;
+    protected bool $valid = true;
 
     /**
      * Max usages
@@ -93,7 +104,9 @@ class CouponCode
      * CouponCode constructor.
      *
      * @param int $id - Invite Code ID
+     *
      * @throws CouponCodeException
+     * @throws \Exception
      */
     public function __construct(int $id)
     {
@@ -126,22 +139,22 @@ public function __construct(int $id)
             ], 404);
         }
 
-        $data = \current($result);
+        $data = current($result);
 
         $this->id    = (int)$data['id'];
         $this->code  = $data['code'];
         $this->title = $data['title'];
 
         if (!empty($data['usages'])) {
-            $this->usages = \json_decode($data['usages'], true);
+            $this->usages = json_decode($data['usages'], true);
         }
 
         if (!empty($data['userIds'])) {
-            $this->userIds = \json_decode($data['userIds'], true);
+            $this->userIds = json_decode($data['userIds'], true);
         }
 
         if (!empty($data['groupIds'])) {
-            $this->groupIds = \json_decode($data['groupIds'], true);
+            $this->groupIds = json_decode($data['groupIds'], true);
         }
 
         if (!empty($data['maxUsages'])) {
@@ -149,13 +162,13 @@ public function __construct(int $id)
         }
 
         if (!empty($data['discountIds'])) {
-            $this->discountIds = \json_decode($data['discountIds'], true);
+            $this->discountIds = json_decode($data['discountIds'], true);
         }
 
-        $this->CreateDate = new \DateTime($data['createDate']);
+        $this->CreateDate = new DateTime($data['createDate']);
 
         if (!empty($data['validUntilDate'])) {
-            $this->ValidUntilDate = new \DateTime($data['validUntilDate']);
+            $this->ValidUntilDate = new DateTime($data['validUntilDate']);
             $this->ValidUntilDate->setTime(23, 59, 59);
         }
 
@@ -181,7 +194,7 @@ public function getCode(): string
     /**
      * @return \DateTime
      */
-    public function getCreateDate(): \DateTime
+    public function getCreateDate(): DateTime
     {
         return $this->CreateDate;
     }
@@ -199,7 +212,7 @@ public function getUsages(): array
     /**
      * @return \DateTime|null
      */
-    public function getValidUntilDate(): ?\DateTime
+    public function getValidUntilDate(): ?DateTime
     {
         return $this->ValidUntilDate;
     }
@@ -233,7 +246,7 @@ public function getDiscounts(): array
         foreach ($this->discountIds as $discountId) {
             try {
                 $discounts[] = $DiscountHandler->getChild($discountId);
-            } catch (\Exception $Exception) {
+            } catch (Exception $Exception) {
                 QUI\System\Log::writeDebugException($Exception);
             }
         }
@@ -270,13 +283,13 @@ public function getGroupIds(): array
      */
     public function redeem($User = null, $Order = null)
     {
-        if (\is_null($User)) {
+        if (is_null($User)) {
             $User = QUI::getUserBySession();
         }
 
         $this->checkRedemption($User);
 
-        $Now = new \DateTime();
+        $Now = new DateTime();
 
         $usage = [
             'userId'          => $User->getId(),
@@ -284,7 +297,7 @@ public function redeem($User = null, $Order = null)
             'orderPrefixedId' => false
         ];
 
-        if (!\is_null($Order) && $Order instanceof QUI\ERP\Order\Order) {
+        if ($Order instanceof QUI\ERP\Order\Order) {
             $usage['orderPrefixedId'] = $Order->getPrefixedId();
         }
 
@@ -331,7 +344,7 @@ public function checkRedemption($User)
             try {
                 /** @var QUI\ERP\Discount\Discount $Discount */
                 $Discount = $DiscountHandler->getChild($discountId);
-            } catch (\Exception $Exception) {
+            } catch (Exception $Exception) {
                 $discountError = $Exception->getMessage();
                 continue;
             }
@@ -343,7 +356,7 @@ public function checkRedemption($User)
         }
 
         if (!$discountsValid) {
-            if (\count($this->discountIds) === 1) {
+            if (count($this->discountIds) === 1) {
                 throw new CouponCodeException([
                     'quiqqer/coupons',
                     'exception.CouponCode.discount_invalid',
@@ -382,7 +395,7 @@ public function checkRedemption($User)
 
         // Restriction to QUIQQER user(s)
         if (!empty($this->userIds)) {
-            if (\in_array($User->getId(), $this->userIds)) {
+            if (in_array($User->getId(), $this->userIds)) {
                 if ($this->maxUsages !== Handler::MAX_USAGE_UNLIMITED
                     && $this->hasUserRedeemed($User)) {
                     throw new CouponCodeException([
@@ -446,7 +459,7 @@ public function checkOrderRedemption($Order)
             try {
                 /** @var QUI\ERP\Discount\Discount $Discount */
                 $Discount = $DiscountHandler->getChild($discountId);
-            } catch (\Exception $Exception) {
+            } catch (Exception $Exception) {
                 $discountError = $Exception->getMessage();
                 continue;
             }
@@ -458,7 +471,7 @@ public function checkOrderRedemption($Order)
         }
 
         if (!$discountsValid) {
-            if (\count($this->discountIds) === 1) {
+            if (count($this->discountIds) === 1) {
                 throw new CouponCodeException([
                     'quiqqer/coupons',
                     'exception.CouponCode.discount_invalid',
@@ -556,7 +569,7 @@ public function delete()
             if (!empty($Discount->getAttribute('hidden'))) {
                 try {
                     $Discount->delete();
-                } catch (\Exception $Exception) {
+                } catch (Exception $Exception) {
                     QUI\System\Log::writeException($Exception);
                 }
             }
@@ -602,7 +615,7 @@ protected function checkValidity()
     {
         // Check if the expiration date has been reached
         if (!empty($this->ValidUntilDate)) {
-            $Now = new \DateTime();
+            $Now = new DateTime();
 
             if ($Now > $this->ValidUntilDate) {
                 $this->valid = false;
@@ -655,7 +668,7 @@ public function addToOrder(QUI\ERP\Order\OrderInProcess $Order)
             return;
         }
 
-        if (!\is_array($coupons)) {
+        if (!is_array($coupons)) {
             return;
         }
 
@@ -665,15 +678,15 @@ public function addToOrder(QUI\ERP\Order\OrderInProcess $Order)
         $vatArray     = $calculations['vatArray'];
         $vat          = false;
 
-        if (\count($vatArray) === 1) {
-            $vat = \array_key_first($vatArray);
+        if (count($vatArray) === 1) {
+            $vat = array_key_first($vatArray);
         }
 
         foreach ($coupons as $coupon) {
             /* @var $Coupon CouponCode */
             try {
                 $Coupon = Handler::getCouponCodeByCode($coupon);
-            } catch (\Exception $Exception) {
+            } catch (Exception $Exception) {
                 continue;
             }
 
@@ -731,13 +744,13 @@ public function addToOrder(QUI\ERP\Order\OrderInProcess $Order)
             $code     = $Article->getCustomData()['code'];
 
             foreach ($articles as $Entry) {
-                if (!\method_exists($Entry, 'getCustomData')) {
+                if (!method_exists($Entry, 'getCustomData')) {
                     continue;
                 }
 
                 $customData = $Entry->getCustomData();
 
-                if (!$customData || !\is_array($customData)) {
+                if (!$customData || !is_array($customData)) {
                     continue;
                 }