diff --git a/src/RecommendationQuery.php b/src/RecommendationQuery.php
index 6f4a9d4..05f5f8b 100644
--- a/src/RecommendationQuery.php
+++ b/src/RecommendationQuery.php
@@ -147,10 +147,6 @@ public function verify()
     {
         parent::verify();
 
-        if (null === $this->recommendationId) {
-            throw new DomainException('recommendationId: (identifier) must be set!');
-        }
-
         if (null === $this->count) {
             throw new DomainException('count: must be set!');
         }