diff --git a/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/MessageBrokerProvider.java b/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/MessageBrokerProvider.java
index ddaedeefefbffc19e7333f1e5f19f2d3f4a07c31..cdd935b2ac06d1a11a886c71853c2c0b39e74956 100644
--- a/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/MessageBrokerProvider.java
+++ b/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/MessageBrokerProvider.java
@@ -8,6 +8,7 @@ import org.opengroup.osdu.core.gcp.oqm.driver.OqmDriver;
 import org.opengroup.osdu.core.gcp.oqm.model.OqmDestination;
 import org.opengroup.osdu.core.gcp.oqm.model.OqmSubscription;
 import org.opengroup.osdu.core.gcp.oqm.model.OqmTopic;
+import org.opengroup.osdu.notification.provider.gcp.service.RegisterSubscriptionService;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Component;
@@ -24,7 +25,7 @@ import static org.opengroup.osdu.notification.provider.gcp.pubsub.OqmSubscriberM
 public class MessageBrokerProvider {
 
     private final OqmDriver driver;
-    private final OqmSubscriptionHandler subscriptionHandler;
+    private final RegisterSubscriptionService subscriptionHandler;
 
     public void validateMessageBrokerConfiguration(TenantInfo tenantInfo) {
         List<OqmTopic> topics = subscriptionHandler.getTopics(tenantInfo.getDataPartitionId());
diff --git a/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmNotificationDeliveryService.java b/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmNotificationDeliveryService.java
index 91b521a717394e5ba4efcfa0203dc08cf8663bfd..ad4d33a25cfaffbe87a135b5e0b6f7b416464612 100644
--- a/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmNotificationDeliveryService.java
+++ b/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmNotificationDeliveryService.java
@@ -29,7 +29,7 @@ import org.opengroup.osdu.core.common.model.notification.Secret;
 import org.opengroup.osdu.core.common.model.notification.Subscription;
 import org.opengroup.osdu.notification.auth.factory.AuthFactory;
 import org.opengroup.osdu.notification.auth.interfaces.SecretAuth;
-import org.opengroup.osdu.notification.provider.gcp.config.ExternalSubscriptionsManager;
+import org.opengroup.osdu.notification.provider.gcp.service.ExternalSubscriptionsManager;
 import org.opengroup.osdu.notification.provider.gcp.config.OqmConfigurationProperties;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.stereotype.Component;
diff --git a/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmSubscriberManager.java b/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmSubscriberManager.java
index 60b1cc7e3886860b0e9d3179150d353b81e0b648..2c51db098d44a298f00e6177acee0d93f1f2d505 100644
--- a/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmSubscriberManager.java
+++ b/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmSubscriberManager.java
@@ -23,10 +23,11 @@ import org.opengroup.osdu.core.common.model.tenant.TenantInfo;
 import org.opengroup.osdu.core.common.provider.interfaces.ITenantFactory;
 import org.opengroup.osdu.core.gcp.oqm.driver.OqmDriver;
 import org.opengroup.osdu.core.gcp.oqm.model.*;
-import org.opengroup.osdu.notification.provider.gcp.config.ExternalSubscriptionsManager;
-import org.opengroup.osdu.notification.provider.gcp.pubsub.receiver.OqmSubscriptionConfigurationReceiver;
+import org.opengroup.osdu.notification.provider.gcp.service.ExternalSubscriptionsManager;
+import org.opengroup.osdu.notification.provider.gcp.pubsub.receiver.OqmConfigurationEventReceiver;
 import org.opengroup.osdu.notification.provider.gcp.pubsub.receiver.OqmReplicatedEventReceiver;
 import org.opengroup.osdu.notification.provider.gcp.pubsub.receiver.OqmEventReplicator;
+import org.opengroup.osdu.notification.provider.gcp.service.RegisterSubscriptionService;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.stereotype.Component;
 
@@ -51,7 +52,7 @@ public class OqmSubscriberManager {
     public static final String SERVICE_SUFFIX = "-service";
     public static final String PUBLISH_SUFFIX = "-publish";
     public static final String CONTROL_SUBSCRIPTION = NOTIFICATION_PREFIX + "control-sub";
-    private final OqmSubscriptionHandler subscriptionHandler;
+    private final RegisterSubscriptionService subscriptionHandler;
     private final ITenantFactory tenantInfoFactory;
     private final OqmDriver driver;
     private final OqmNotificationDeliveryService notificationHandler;
@@ -104,7 +105,7 @@ public class OqmSubscriberManager {
     private void registerControlTopicSubscriber(TenantInfo tenantInfo, OqmSubscription controlTopicSubscription) {
         OqmSubscriber subscriber = OqmSubscriber.builder()
                 .subscription(controlTopicSubscription)
-                .messageReceiver(new OqmSubscriptionConfigurationReceiver(externalSubscriptionsManager))
+                .messageReceiver(new OqmConfigurationEventReceiver(externalSubscriptionsManager))
                 .build();
         driver.subscribe(subscriber, getDestination(tenantInfo));
     }
diff --git a/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/receiver/OqmSubscriptionConfigurationReceiver.java b/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/receiver/OqmConfigurationEventReceiver.java
similarity index 89%
rename from provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/receiver/OqmSubscriptionConfigurationReceiver.java
rename to provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/receiver/OqmConfigurationEventReceiver.java
index b106395eec23a5d2ed6a1cb07bc18689c810586e..769cf961ce6c59190836b2dc45ffb0092c0429e8 100644
--- a/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/receiver/OqmSubscriptionConfigurationReceiver.java
+++ b/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/receiver/OqmConfigurationEventReceiver.java
@@ -22,11 +22,11 @@ import lombok.extern.slf4j.Slf4j;
 import org.opengroup.osdu.core.gcp.oqm.model.OqmAckReplier;
 import org.opengroup.osdu.core.gcp.oqm.model.OqmMessage;
 import org.opengroup.osdu.core.gcp.oqm.model.OqmMessageReceiver;
-import org.opengroup.osdu.notification.provider.gcp.config.ExternalSubscriptionsManager;
+import org.opengroup.osdu.notification.provider.gcp.service.ExternalSubscriptionsManager;
 import org.opengroup.osdu.notification.provider.gcp.thread.ThreadScopeContextHolder;
 
 @Slf4j
-public class OqmSubscriptionConfigurationReceiver implements OqmMessageReceiver {
+public class OqmConfigurationEventReceiver implements OqmMessageReceiver {
 
     private static final String SUBSCRIPTION_CREATED = "Subscription Created";
     private static final String SUBSCRIPTION_UPDATED = "Subscription Updated";
@@ -34,7 +34,7 @@ public class OqmSubscriptionConfigurationReceiver implements OqmMessageReceiver
 
     private final ExternalSubscriptionsManager externalSubscriptionsManager;
 
-    public OqmSubscriptionConfigurationReceiver(ExternalSubscriptionsManager externalSubscriptionsManager) {
+    public OqmConfigurationEventReceiver(ExternalSubscriptionsManager externalSubscriptionsManager) {
         this.externalSubscriptionsManager = externalSubscriptionsManager;
     }
 
@@ -48,7 +48,6 @@ public class OqmSubscriptionConfigurationReceiver implements OqmMessageReceiver
         } finally {
             ThreadScopeContextHolder.currentThreadScopeAttributes().clear();
         }
-
         log.debug("OQM | Control topic | Message acknowledged by client");
         replier.ack();
     }
@@ -62,8 +61,7 @@ public class OqmSubscriptionConfigurationReceiver implements OqmMessageReceiver
         log.debug("OQM | Control topic | Received message: `{}` for service topic: `{}` with Sub ID: `{}`", pubsubMessage, serviceTopic, subscriptionId);
 
         switch (pubsubMessage) {
-            case SUBSCRIPTION_CREATED:
-            case SUBSCRIPTION_UPDATED:
+            case SUBSCRIPTION_CREATED, SUBSCRIPTION_UPDATED:
                 externalSubscriptionsManager.updateSubscription(dataPartitionId, subscriptionId);
                 log.debug("OQM | Control topic | Subscription info with Sub ID: `{}` and topic: `{}` was added to cache.", subscriptionId, serviceTopic);
                 break;
@@ -72,7 +70,7 @@ public class OqmSubscriptionConfigurationReceiver implements OqmMessageReceiver
                 if (deleted) {
                     log.debug("OQM | Control topic | Subscription info with Sub ID: `{}` and topic: `{}` was removed from cache.", subscriptionId, serviceTopic);
                 } else {
-                    log.warn("OQM | Control topic requested to delete subscription with id: `{}`, but is was not found in cache.", subscriptionId);
+                    log.warn("OQM | Control topic requested to delete subscription with id: `{}`, but it was not found in cache.", subscriptionId);
                 }
                 break;
             default:
diff --git a/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/receiver/OqmEventReplicator.java b/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/receiver/OqmEventReplicator.java
index 3420944f2f6f6faaadcd086524f81c54eca7ce61..9b98e761bd07773f3917d5502420b4cdf73a6712 100644
--- a/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/receiver/OqmEventReplicator.java
+++ b/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/receiver/OqmEventReplicator.java
@@ -32,7 +32,7 @@ import org.opengroup.osdu.core.gcp.oqm.model.OqmMessage;
 import org.opengroup.osdu.core.gcp.oqm.model.OqmMessageReceiver;
 import org.opengroup.osdu.core.gcp.oqm.model.OqmSubscription;
 import org.opengroup.osdu.core.gcp.oqm.model.OqmTopic;
-import org.opengroup.osdu.notification.provider.gcp.config.ExternalSubscriptionsManager;
+import org.opengroup.osdu.notification.provider.gcp.service.ExternalSubscriptionsManager;
 import org.opengroup.osdu.notification.provider.gcp.thread.ThreadScopeContextHolder;
 
 /**
diff --git a/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/config/SubscriptionCacheRepo.java b/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/repo/SubscriptionCacheRepo.java
similarity index 75%
rename from provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/config/SubscriptionCacheRepo.java
rename to provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/repo/SubscriptionCacheRepo.java
index 654c6468ef5d73cc1e470b5cf4951dd772483a90..90380900fed52d9be81e4064e2228814362bd53b 100644
--- a/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/config/SubscriptionCacheRepo.java
+++ b/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/repo/SubscriptionCacheRepo.java
@@ -15,7 +15,7 @@
  *  limitations under the License.
  */
 
-package org.opengroup.osdu.notification.provider.gcp.config;
+package org.opengroup.osdu.notification.provider.gcp.repo;
 
 import java.util.Collections;
 import java.util.HashSet;
@@ -25,6 +25,7 @@ import java.util.concurrent.TimeUnit;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.opengroup.osdu.core.common.model.notification.Subscription;
+import org.opengroup.osdu.notification.provider.gcp.config.RedisProperties;
 import org.springframework.data.redis.core.Cursor;
 import org.springframework.data.redis.core.RedisTemplate;
 import org.springframework.data.redis.core.ScanOptions;
@@ -35,6 +36,7 @@ import org.springframework.stereotype.Service;
 @RequiredArgsConstructor
 public class SubscriptionCacheRepo {
 
+  public static final String POISON = ":poison";
   private final RedisProperties redisProperties;
   private final RedisTemplate<String, Subscription> redisTemplate;
 
@@ -62,6 +64,39 @@ public class SubscriptionCacheRepo {
     return redisTemplate.opsForValue().get(subscriberCacheKey);
   }
 
+  /**
+   * To avoid Register service spamming, if a subscriber was deleted, but replicated events are
+   * still being processed.
+   *
+   * @param dataPartitionId
+   * @param topic
+   * @param subscriptionId
+   */
+  public void poisonSub(String dataPartitionId, String topic, String subscriptionId) {
+    String subPoisonKey = getSubscriberCacheKey(dataPartitionId, topic, subscriptionId) + POISON;
+
+    redisTemplate.opsForValue().set(
+        subPoisonKey,
+        new Subscription(),
+        redisProperties.getRedisExpiration(),
+        TimeUnit.SECONDS
+    );
+  }
+
+  /**
+   * Used to check if subscribers were not found in Register.
+   *
+   * @param dataPartitionId
+   * @param topic
+   * @param subscriptionId
+   * @return empty Subscription
+   */
+  public Subscription checkIfSubIsPoisoned(String dataPartitionId, String topic,
+      String subscriptionId) {
+    String subPoisonKey = getSubscriberCacheKey(dataPartitionId, topic, subscriptionId) + POISON;
+    return redisTemplate.opsForValue().get(subPoisonKey);
+  }
+
   public void updateSubscription(String dataPartitionId, Subscription subscription) {
     String subscriberCacheKey = getSubscriberCacheKey(
         dataPartitionId,
diff --git a/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/config/ExternalSubscriptionsManager.java b/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/service/ExternalSubscriptionsManager.java
similarity index 55%
rename from provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/config/ExternalSubscriptionsManager.java
rename to provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/service/ExternalSubscriptionsManager.java
index 3a3bd98b249187e58d2954ad58209ab603d6cc07..ab7e558f0a6fb0643da8e3ff6d4f18a4e5c0bdd5 100644
--- a/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/config/ExternalSubscriptionsManager.java
+++ b/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/service/ExternalSubscriptionsManager.java
@@ -15,7 +15,7 @@
  *  limitations under the License.
  */
 
-package org.opengroup.osdu.notification.provider.gcp.config;
+package org.opengroup.osdu.notification.provider.gcp.service;
 
 import java.util.List;
 import java.util.Objects;
@@ -23,7 +23,7 @@ import java.util.Set;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.opengroup.osdu.core.common.model.notification.Subscription;
-import org.opengroup.osdu.notification.provider.gcp.pubsub.OqmSubscriptionHandler;
+import org.opengroup.osdu.notification.provider.gcp.repo.SubscriptionCacheRepo;
 import org.springframework.stereotype.Component;
 
 @Component
@@ -32,7 +32,7 @@ import org.springframework.stereotype.Component;
 public class ExternalSubscriptionsManager {
 
   private final SubscriptionCacheRepo subscriptionCacheRepo;
-  private final OqmSubscriptionHandler subscriptionHandler;
+  private final RegisterSubscriptionService subscriptionHandler;
 
   public void invokeTenantSubscribers(String dataPartitionId) {
     Set<Subscription> members = subscriptionCacheRepo.getDataPartitionSubscribers(dataPartitionId);
@@ -47,11 +47,29 @@ public class ExternalSubscriptionsManager {
   }
 
   public Subscription getSubscription(String dataPartitionId, String topic, String subscriptionId) {
-    return subscriptionCacheRepo.readSubscription(
-        dataPartitionId,
-        topic,
-        subscriptionId
-    );
+    Subscription subscription = subscriptionCacheRepo.readSubscription(dataPartitionId, topic, subscriptionId);
+    if (subscription != null) {
+      return subscription;
+    }
+
+    log.debug("Subscription: {} not in cache, checking if it available in Register.", subscriptionId);
+    subscription = subscriptionCacheRepo.checkIfSubIsPoisoned(dataPartitionId, topic, subscriptionId);
+    if (subscription != null) {
+      log.debug("Subscription:{} marked as not available in cache.", subscriptionId);
+      return null;
+    }
+    return retrieveSubscriptionFromHandler(dataPartitionId, subscriptionId, topic);
+  }
+
+  private Subscription retrieveSubscriptionFromHandler(String dataPartitionId, String subscriptionId, String topic) {
+    Subscription subscription = subscriptionHandler.getSubscriptionsByNotificationId(dataPartitionId,subscriptionId);
+    if (subscription == null) {
+      log.debug("Subscription:{} not available in Register. Marking it as not available in cache.", subscriptionId);
+      subscriptionCacheRepo.poisonSub(dataPartitionId, topic, subscriptionId);
+      return null;
+    }
+    subscriptionCacheRepo.writeSubscription(dataPartitionId, subscription);
+    return subscription;
   }
 
   public boolean removeSubscription(String dataPartitionId, String topic, String subscriptionId) {
@@ -63,17 +81,23 @@ public class ExternalSubscriptionsManager {
         dataPartitionId,
         subscriptionId
     );
-    subscriptionCacheRepo.updateSubscription(dataPartitionId, subscription);
+    if(Objects.isNull(subscription)){
+      log.warn("Cannot update sub config with id:{} in the cache. Skipping it.", subscriptionId);
+    }else {
+      subscriptionCacheRepo.updateSubscription(dataPartitionId, subscription);
+    }
   }
 
   private void reloadSubscriptionInfoCache(String dataPartitionId) {
     List<Subscription> fragmentarySubInfos = subscriptionHandler.getAllSubscriptionInfos(
         dataPartitionId);
     for (Subscription freagmentedSubscription : fragmentarySubInfos) {
-      Subscription subscription = subscriptionHandler.getSubscriptionsByNotificationId(
-          dataPartitionId, freagmentedSubscription.getNotificationId());
-      subscriptionCacheRepo.writeSubscription(dataPartitionId, subscription);
+      Subscription subscription = subscriptionHandler.getSubscriptionsByNotificationId(dataPartitionId, freagmentedSubscription.getNotificationId());
+      if(Objects.isNull(subscription)){
+        log.warn("Cannot init cache for sub id:{}. Empty response from Register. Skipping it.", freagmentedSubscription.getNotificationId());
+      }else {
+        subscriptionCacheRepo.writeSubscription(dataPartitionId, subscription);
+      }
     }
   }
-
 }
\ No newline at end of file
diff --git a/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmSubscriptionHandler.java b/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/service/RegisterSubscriptionService.java
similarity index 91%
rename from provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmSubscriptionHandler.java
rename to provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/service/RegisterSubscriptionService.java
index 4f7e33c5a81d41033550ba1e823b56cc83d50bf0..b41976eec34a1d8d5f1268450727d1c8ca8fd966 100644
--- a/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmSubscriptionHandler.java
+++ b/provider/notification-gc/src/main/java/org/opengroup/osdu/notification/provider/gcp/service/RegisterSubscriptionService.java
@@ -15,7 +15,7 @@
  *  limitations under the License.
  */
 
-package org.opengroup.osdu.notification.provider.gcp.pubsub;
+package org.opengroup.osdu.notification.provider.gcp.service;
 
 import java.util.List;
 import java.util.stream.Collectors;
@@ -43,7 +43,7 @@ import org.springframework.stereotype.Component;
 @RequiredArgsConstructor
 @ConditionalOnProperty(name = "oqmDriver")
 @Slf4j
-public class OqmSubscriptionHandler {
+public class RegisterSubscriptionService {
 
     private final ISubscriptionFactory registerClientFactory;
     private final DpsHeadersProvider dpsHeadersProvider;
@@ -52,7 +52,6 @@ public class OqmSubscriptionHandler {
     public List<OqmTopic> getTopics(String dataPartitionId) {
         DpsHeaders headers = dpsHeadersProvider.getDpsHeaders(dataPartitionId);
         ISubscriptionService registerClient = registerClientFactory.create(headers);
-
         try {
             return registerClient.getTopics()
                     .stream()
@@ -80,7 +79,12 @@ public class OqmSubscriptionHandler {
             DpsHeaders headers = dpsHeadersProvider.getDpsHeaders(dataPartitionId);
             ISubscriptionService registerClient = registerClientFactory.create(headers);
             List<Subscription> subscriptions = registerClient.query(subscriptionId);
-            return subscriptions.get(0);
+            if(subscriptions.isEmpty()){
+                log.warn("Empty response from Register for subId: {}, config fetch not possible.", subscriptionId);
+                return null;
+            }else {
+                return subscriptions.get(0);
+            }
         } catch (SubscriptionException se) {
             throw new AppException(HttpStatus.SC_INTERNAL_SERVER_ERROR, "Server error", "Unexpected error while sending request", se);
         }
diff --git a/provider/notification-gc/src/test/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmSubscriptionConfigurationReceiverTest.java b/provider/notification-gc/src/test/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmConfigurationEventReceiverTest.java
similarity index 91%
rename from provider/notification-gc/src/test/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmSubscriptionConfigurationReceiverTest.java
rename to provider/notification-gc/src/test/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmConfigurationEventReceiverTest.java
index 8c49714703f797917d55c23d317fa1f987e5946f..81357498098df662d7a455a14ffd368dfc082473 100644
--- a/provider/notification-gc/src/test/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmSubscriptionConfigurationReceiverTest.java
+++ b/provider/notification-gc/src/test/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmConfigurationEventReceiverTest.java
@@ -31,15 +31,15 @@ import org.mockito.junit.MockitoJUnitRunner;
 import org.opengroup.osdu.core.common.model.notification.Subscription;
 import org.opengroup.osdu.core.gcp.oqm.model.OqmAckReplier;
 import org.opengroup.osdu.core.gcp.oqm.model.OqmMessage;
-import org.opengroup.osdu.notification.provider.gcp.config.ExternalSubscriptionsManager;
-import org.opengroup.osdu.notification.provider.gcp.config.SubscriptionCacheRepo;
-import org.opengroup.osdu.notification.provider.gcp.pubsub.receiver.OqmSubscriptionConfigurationReceiver;
+import org.opengroup.osdu.notification.provider.gcp.service.ExternalSubscriptionsManager;
+import org.opengroup.osdu.notification.provider.gcp.repo.SubscriptionCacheRepo;
+import org.opengroup.osdu.notification.provider.gcp.pubsub.receiver.OqmConfigurationEventReceiver;
 
 @RunWith(MockitoJUnitRunner.class)
-public class OqmSubscriptionConfigurationReceiverTest {
+public class OqmConfigurationEventReceiverTest {
 
     @InjectMocks
-    private OqmSubscriptionConfigurationReceiver sut;
+    private OqmConfigurationEventReceiver sut;
     @Mock
     private OqmAckReplier replier;
     @Mock
diff --git a/provider/notification-gc/src/test/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmEventReplicatorTest.java b/provider/notification-gc/src/test/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmEventReplicatorTest.java
index 9582f4cfec3e2e96ac5f528622d9990903fef206..776c169b3459bea532e85a9f5c026de4d43f8149 100644
--- a/provider/notification-gc/src/test/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmEventReplicatorTest.java
+++ b/provider/notification-gc/src/test/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmEventReplicatorTest.java
@@ -17,7 +17,6 @@
 
 package org.opengroup.osdu.notification.provider.gcp.pubsub;
 
-import java.util.HashSet;
 import java.util.Set;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
@@ -30,13 +29,11 @@ import org.mockito.junit.MockitoJUnitRunner;
 import org.opengroup.osdu.core.common.model.notification.Subscription;
 import org.opengroup.osdu.core.gcp.oqm.driver.OqmDriver;
 import org.opengroup.osdu.core.gcp.oqm.model.*;
-import org.opengroup.osdu.notification.provider.gcp.config.ExternalSubscriptionsManager;
+import org.opengroup.osdu.notification.provider.gcp.service.ExternalSubscriptionsManager;
 import org.opengroup.osdu.notification.provider.gcp.pubsub.receiver.OqmEventReplicator;
 
-import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
-import java.util.List;
 
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.*;
diff --git a/provider/notification-gc/src/test/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmSubscriberManagerTest.java b/provider/notification-gc/src/test/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmSubscriberManagerTest.java
index 7269114cfc01d549e969b982ca832bffe54f08c9..025bad77c97f4e63805df4c5682f700c9af5e57a 100644
--- a/provider/notification-gc/src/test/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmSubscriberManagerTest.java
+++ b/provider/notification-gc/src/test/java/org/opengroup/osdu/notification/provider/gcp/pubsub/OqmSubscriberManagerTest.java
@@ -27,10 +27,11 @@ import org.opengroup.osdu.core.common.model.tenant.TenantInfo;
 import org.opengroup.osdu.core.common.provider.interfaces.ITenantFactory;
 import org.opengroup.osdu.core.gcp.oqm.driver.OqmDriver;
 import org.opengroup.osdu.core.gcp.oqm.model.OqmTopic;
-import org.opengroup.osdu.notification.provider.gcp.config.ExternalSubscriptionsManager;
+import org.opengroup.osdu.notification.provider.gcp.service.ExternalSubscriptionsManager;
 
 import java.util.Arrays;
 import java.util.List;
+import org.opengroup.osdu.notification.provider.gcp.service.RegisterSubscriptionService;
 
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.*;
@@ -47,7 +48,7 @@ public class OqmSubscriberManagerTest {
     @Mock
     private MessageBrokerProvider subscriptionProvider;
     @Mock
-    private OqmSubscriptionHandler subscriptionHandler;
+    private RegisterSubscriptionService subscriptionHandler;
     @Mock
     private ExternalSubscriptionsManager externalSubscriptionsManager;