diff --git a/app/Http/Controllers/Apis/Protected/Summit/OAuth2SummitPromoCodesApiController.php b/app/Http/Controllers/Apis/Protected/Summit/OAuth2SummitPromoCodesApiController.php
index 7d684a1e5..f9f4cd2d0 100644
--- a/app/Http/Controllers/Apis/Protected/Summit/OAuth2SummitPromoCodesApiController.php
+++ b/app/Http/Controllers/Apis/Protected/Summit/OAuth2SummitPromoCodesApiController.php
@@ -717,8 +717,17 @@ public function preValidatePromoCode($summit_id, $promo_code_val)
 
             if (is_null($filter)) $filter = new Filter();
 
+            if (!$filter->hasFilter('ticket_type_id'))
+                return $this->error412("Type ID is required.");
+
+            if (!$filter->hasFilter('ticket_type_qty'))
+                return $this->error412("Quantity is required.");
+
+            if (!$filter->hasFilter('ticket_type_subtype'))
+                return $this->error412("Subtype is required.");
+
             $filter->validate([
-                'ticket_type_id'      => 'required|integer',
+                'ticket_type_id'      => 'integer',
                 'ticket_type_qty'     => [
                     'required',
                     'integer',
@@ -729,11 +738,16 @@ function ($attribute, $value, $fail) use ($filter) {
                         }
                     },
                 ],
-                'ticket_type_subtype' => 'required|string|in:'.join(",", SummitTicketType::SubTypes),
+                'ticket_type_subtype' => 'string|in:'.join(",", SummitTicketType::SubTypes),
             ]);
 
-            $this->promo_code_service
-                ->preValidatePromoCode($summit, $this->resource_server_context->getCurrentUser(), $promo_code_val, $filter);
+            $this->promo_code_service->preValidatePromoCode(
+                $summit,
+                $this->resource_server_context->getCurrentUser(),
+                $promo_code_val,
+                intval($filter->getUniqueFilter('ticket_type_id')->getValue()),
+                $filter->getUniqueFilter('ticket_type_subtype')->getValue(),
+                intval($filter->getUniqueFilter('ticket_type_qty')->getValue()));
 
             return $this->ok();
         });
diff --git a/app/Services/Model/ISummitPromoCodeService.php b/app/Services/Model/ISummitPromoCodeService.php
index 787b37fa7..00cb7b7a3 100644
--- a/app/Services/Model/ISummitPromoCodeService.php
+++ b/app/Services/Model/ISummitPromoCodeService.php
@@ -139,9 +139,12 @@ public function removePromoCodeSpeaker(SummitRegistrationPromoCode $promo_code,
      * @param Summit $summit
      * @param Member $owner
      * @param string $promo_code_value
-     * @param Filter $filter
+     * @param int $ticket_type_id
+     * @param string $ticket_type_subtype
+     * @param int $qty
      * @return void
      * @throws \Exception
      */
-    public function preValidatePromoCode(Summit $summit, Member $owner, string $promo_code_value, Filter $filter):void;
+    public function preValidatePromoCode(
+        Summit $summit, Member $owner, string $promo_code_value, int $ticket_type_id, string $ticket_type_subtype, int $qty):void;
 }
\ No newline at end of file
diff --git a/app/Services/Model/Imp/SummitPromoCodeService.php b/app/Services/Model/Imp/SummitPromoCodeService.php
index b6c841c7a..3e1600c7c 100644
--- a/app/Services/Model/Imp/SummitPromoCodeService.php
+++ b/app/Services/Model/Imp/SummitPromoCodeService.php
@@ -756,24 +756,22 @@ public function removePromoCodeSpeaker(SummitRegistrationPromoCode $promo_code,
      * @param Summit $summit
      * @param Member $owner
      * @param string $promo_code_value
-     * @param Filter $filter
+     * @param int $ticket_type_id
+     * @param string $ticket_type_subtype
+     * @param int $qty
      * @return void
      * @throws \Exception
      */
-    public function preValidatePromoCode(Summit $summit, Member $owner, string $promo_code_value, Filter $filter):void
+    public function preValidatePromoCode(
+        Summit $summit, Member $owner, string $promo_code_value, int $ticket_type_id, string $ticket_type_subtype, int $qty):void
     {
-        $this->tx_service->transaction(function () use ($summit, $owner, $promo_code_value, $filter) {
-
-            $ticket_type_id = intval($filter->getUniqueFilter('ticket_type_id')->getValue());
+        $this->tx_service->transaction(function () use ($summit, $owner, $promo_code_value, $ticket_type_id, $ticket_type_subtype, $qty) {
 
             $ticket_type = $summit->getTicketTypeById($ticket_type_id);
             if (is_null($ticket_type)) {
                 throw new EntityNotFoundException(sprintf("Ticket Type %s not found on summit %s.", $ticket_type_id, $summit->getId()));
             }
 
-            $ticket_type_subtype = $filter->getUniqueFilter('ticket_type_subtype')->getValue();
-            $qty = intval($filter->getUniqueFilter('ticket_type_qty')->getValue());
-
             $validator = PromoCodeValidationStrategyFactory::createStrategy($ticket_type, $ticket_type_subtype, $qty, $owner);
 
             $promo_code = $this->repository->getByValueExclusiveLock($summit, $promo_code_value);
@@ -781,7 +779,6 @@ public function preValidatePromoCode(Summit $summit, Member $owner, string $prom
             if (!$promo_code instanceof SummitRegistrationPromoCode || $promo_code->getSummitId() != $summit->getId() || !$validator->isValid($promo_code)){
                 throw new ValidationException(sprintf('The Promo Code "%s" is not a valid code.', $promo_code_value));
             }
-
         });
     }
 }
\ No newline at end of file