diff --git a/louloulibs/xmpp/xmpp_component.cpp b/louloulibs/xmpp/xmpp_component.cpp
index 3ac617c21d09bef7fe822556bd25a91620ca6291..fa8b0a5cd1c2d1a0cd04a30974583b612d4259a0 100644
--- a/louloulibs/xmpp/xmpp_component.cpp
+++ b/louloulibs/xmpp/xmpp_component.cpp
@@ -367,31 +367,6 @@ void XmppComponent::send_invalid_room_error(const std::string& muc_name,
   this->send_stanza(presence);
 }
 
-void XmppComponent::send_invalid_user_error(const std::string& user_name, const std::string& to)
-{
-  Stanza message("message");
-  message["from"] = user_name + "@" + this->served_hostname;
-  message["to"] = to;
-  message["type"] = "error";
-  XmlNode x("x");
-  x["xmlns"] = MUC_NS;
-  message.add_child(std::move(x));
-  XmlNode error("error");
-  error["type"] = "cancel";
-  XmlNode item_not_found("item-not-found");
-  item_not_found["xmlns"] = STANZA_NS;
-  error.add_child(std::move(item_not_found));
-  XmlNode text("text");
-  text["xmlns"] = STANZA_NS;
-  text["xml:lang"] = "en";
-  text.set_inner(user_name +
-                 " is not a valid IRC user name. A correct user jid is of the form: <nick>!<server>@" +
-                 this->served_hostname);
-  error.add_child(std::move(text));
-  message.add_child(std::move(error));
-  this->send_stanza(message);
-}
-
 void XmppComponent::send_topic(const std::string& from, Xmpp::body&& topic, const std::string& to, const std::string& who)
 {
   XmlNode message("message");
diff --git a/louloulibs/xmpp/xmpp_component.hpp b/louloulibs/xmpp/xmpp_component.hpp
index 45a40381a37050655b7900a282d9375a7f357de5..5f5f9373f8c94f1f51bf6848ab2359f2b439a7f7 100644
--- a/louloulibs/xmpp/xmpp_component.hpp
+++ b/louloulibs/xmpp/xmpp_component.hpp
@@ -127,12 +127,6 @@ public:
   void send_invalid_room_error(const std::string& muc_jid,
                                const std::string& nick,
                                const std::string& to);
-  /**
-   * Send an error to indicate that the user tried to send a message to an
-   * invalid user.
-   */
-  void send_invalid_user_error(const std::string& user_name,
-                               const std::string& to);
   /**
    * Send the MUC topic to the user
    */
diff --git a/src/xmpp/biboumi_component.cpp b/src/xmpp/biboumi_component.cpp
index 010b415ac4a772cc77f4fcb31e0d515d7b4a811f..d6782e20a53fa97771dfb0648b939bb06aa08d53 100644
--- a/src/xmpp/biboumi_component.cpp
+++ b/src/xmpp/biboumi_component.cpp
@@ -269,8 +269,6 @@ void BiboumiComponent::handle_message(const Stanza& stanza)
           }
 
     }
-  else if (iid.type == Iid::Type::User)
-    this->send_invalid_user_error(to.local, from_str);
   } catch (const IRCNotConnected& ex)
     {
       this->send_stanza_error("message", from_str, to_str, id,