diff --git a/libretroshare/src/services/p3gxschannels.cc b/libretroshare/src/services/p3gxschannels.cc
index cff1ffc74..6410bd396 100644
--- a/libretroshare/src/services/p3gxschannels.cc
+++ b/libretroshare/src/services/p3gxschannels.cc
@@ -220,7 +220,13 @@ void p3GxsChannels::notifyChanges(std::vector<RsGxsNotify *> &changes)
 							std::list<RsGxsGroupId>::iterator git;
 							for (git = grpList.begin(); git != grpList.end(); ++git)
 							{
-								notify->AddFeedItem(RS_FEED_ITEM_CHANNEL_NEW, git->toStdString());
+                                if(mKnownChannels.find(*git) == mKnownChannels.end())
+                                {
+									notify->AddFeedItem(RS_FEED_ITEM_CHANNEL_NEW, git->toStdString());
+                                    mKnownChannels.insert(*git) ;
+                                }
+                                else
+                                    std::cerr << "(II) Not notifying already known channel " << *git << std::endl;
 							}
 							break;
 						}
diff --git a/libretroshare/src/services/p3gxschannels.h b/libretroshare/src/services/p3gxschannels.h
index ccdca94f5..db73448cd 100644
--- a/libretroshare/src/services/p3gxschannels.h
+++ b/libretroshare/src/services/p3gxschannels.h
@@ -218,6 +218,7 @@ bool generateGroup(uint32_t &token, std::string groupName);
 	RsGxsMessageId mGenThreadId;
 
 	p3GxsCommentService *mCommentService;	
+    std::set<RsGxsGroupId> mKnownChannels;
 };
 
 #endif 
diff --git a/libretroshare/src/services/p3gxsforums.cc b/libretroshare/src/services/p3gxsforums.cc
index f27c255dd..29c7ed6c7 100644
--- a/libretroshare/src/services/p3gxsforums.cc
+++ b/libretroshare/src/services/p3gxsforums.cc
@@ -142,9 +142,16 @@ void p3GxsForums::notifyChanges(std::vector<RsGxsNotify *> &changes)
 							/* group received */
 							std::list<RsGxsGroupId> &grpList = grpChange->mGrpIdList;
 							std::list<RsGxsGroupId>::iterator git;
+
 							for (git = grpList.begin(); git != grpList.end(); ++git)
 							{
-								notify->AddFeedItem(RS_FEED_ITEM_FORUM_NEW, git->toStdString());
+                                if(mKnownForums.find(*git) == mKnownForums.end())
+                                {
+									notify->AddFeedItem(RS_FEED_ITEM_FORUM_NEW, git->toStdString());
+                                    mKnownForums.insert(*git) ;
+                                }
+                                else
+                                    std::cerr << "(II) Not notifying already known forum " << *git << std::endl;
 							}
 							break;
 						}
diff --git a/libretroshare/src/services/p3gxsforums.h b/libretroshare/src/services/p3gxsforums.h
index 7f659469c..1e2e78d92 100644
--- a/libretroshare/src/services/p3gxsforums.h
+++ b/libretroshare/src/services/p3gxsforums.h
@@ -117,6 +117,7 @@ bool generateGroup(uint32_t &token, std::string groupName);
 	int mGenCount;
 	std::vector<ForumDummyRef> mGenRefs;
 	RsGxsMessageId mGenThreadId;
+    std::set<RsGxsGroupId> mKnownForums ;
 	
 };