diff --git a/rc_chat_room/src/operations/mod.rs b/rc_chat_room/src/operations/mod.rs
index a4bb3ad..7446e7c 100644
--- a/rc_chat_room/src/operations/mod.rs
+++ b/rc_chat_room/src/operations/mod.rs
@@ -11,6 +11,7 @@ use polariton_server::operations::OperationsHandler;
 
 pub fn handler(chat_system: crate::state::chat::ChatImpl, data_root: impl AsRef<std::path::Path>, conf: &rc_core::persist::config::ConfigImpl) -> OperationsHandler<crate::UserTy> {
     OperationsHandler::new()
+        .modify(rc_core::polariton::OpIdCopy)
         .add(more_auth::MoreLobbyAuth::new(chat_system.clone(), data_root))
         .add(chat_ignores::ignores_provider())
         .add(pending_sanctions::pending_sanctions_checker())
diff --git a/rc_core/src/lib.rs b/rc_core/src/lib.rs
index 12707cc..8e15c36 100644
--- a/rc_core/src/lib.rs
+++ b/rc_core/src/lib.rs
@@ -7,3 +7,5 @@ pub use state::UserState;
 pub mod persist;
 pub use persist::user::{UserImpl, UserProvider, UserAuthenticator};
 pub use persist::config::{ConfigImpl, ConfigProvider};
+
+pub mod polariton;
diff --git a/rc_core/src/polariton/mod.rs b/rc_core/src/polariton/mod.rs
new file mode 100644
index 0000000..4147b30
--- /dev/null
+++ b/rc_core/src/polariton/mod.rs
@@ -0,0 +1,2 @@
+mod svelto_uuid_copy;
+pub use svelto_uuid_copy::OpIdCopy;
diff --git a/rc_core/src/polariton/svelto_uuid_copy.rs b/rc_core/src/polariton/svelto_uuid_copy.rs
new file mode 100644
index 0000000..7a5e199
--- /dev/null
+++ b/rc_core/src/polariton/svelto_uuid_copy.rs
@@ -0,0 +1,15 @@
+use polariton_server::operations::OperationModifier;
+
+pub struct OpIdCopy;
+
+impl OpIdCopy {
+    const SERVICE_MAPPING_KEY: u8 = 0;
+}
+
+impl <C: Clone + Send + Sync + 'static> OperationModifier<C> for OpIdCopy {
+    fn after(&self, req: &mut polariton::operation::OperationRequest<C>, resp: &mut polariton::operation::OperationResponse<C>) {
+        if let Some(svelto_service_id) = req.params.get(&Self::SERVICE_MAPPING_KEY) {
+            resp.params.insert(Self::SERVICE_MAPPING_KEY, svelto_service_id.to_owned());
+        }
+    }
+}
diff --git a/rc_services_room/src/operations/mod.rs b/rc_services_room/src/operations/mod.rs
index 5918d80..ed6eb08 100644
--- a/rc_services_room/src/operations/mod.rs
+++ b/rc_services_room/src/operations/mod.rs
@@ -85,6 +85,7 @@ use polariton_server::operations::OperationsHandler;
 
 pub fn handler(init_ctx: &crate::InitConfig) -> OperationsHandler<crate::UserTy> {
     OperationsHandler::new()
+        .modify(rc_core::polariton::OpIdCopy)
         .add(eac::EacChallengeIgnorer)
         .add(more_auth::MoreLobbyAuth)
         .add(versioner::VersionTeller)
diff --git a/rc_singleplayer_room/src/operations/mod.rs b/rc_singleplayer_room/src/operations/mod.rs
index fe2eec2..92fefa0 100644
--- a/rc_singleplayer_room/src/operations/mod.rs
+++ b/rc_singleplayer_room/src/operations/mod.rs
@@ -6,6 +6,7 @@ use polariton_server::operations::OperationsHandler;
 
 pub fn handler() -> OperationsHandler<crate::UserTy> {
     OperationsHandler::<crate::UserTy>::new()
+        .modify(rc_core::polariton::OpIdCopy)
         .add(more_auth::MoreLobbyAuth)
         .add(eac::EacChallengeIgnorer)
         .add(load_ai_robots::tdm_machines_provider())
diff --git a/rc_social_room/src/operations/mod.rs b/rc_social_room/src/operations/mod.rs
index 860ee71..bac5a8d 100644
--- a/rc_social_room/src/operations/mod.rs
+++ b/rc_social_room/src/operations/mod.rs
@@ -12,6 +12,7 @@ use polariton_server::operations::OperationsHandler;
 
 pub fn handler() -> OperationsHandler<crate::UserTy, crate::data::custom::CustomType> {
     OperationsHandler::<crate::UserTy, crate::data::custom::CustomType>::new()
+        .modify(rc_core::polariton::OpIdCopy)
         .add(more_auth::MoreLobbyAuth)
         //.add(polariton_server::operations::Ack::<33, _>::default()) // get user clan info (this is equivalent to not being in a clan)
         .add(friend_list::friends_provider()) // TODO friend object parsing Token: 0x0200169C RID: 5788