diff --git a/contracts/src/components/registry/interface.cairo b/contracts/src/components/registry/interface.cairo
index dc271c2..60c5304 100644
--- a/contracts/src/components/registry/interface.cairo
+++ b/contracts/src/components/registry/interface.cairo
@@ -2,7 +2,7 @@ use core::hash::HashStateExTrait;
 use starknet::ContractAddress;
 use zkramp::utils::hash::HashSerializable;
 
-#[derive(Drop, Serde)]
+#[derive(Drop, Serde, Clone)]
 pub enum OffchainId {
     Revolut: ByteArray
 }
diff --git a/contracts/src/components/registry/registry.cairo b/contracts/src/components/registry/registry.cairo
index 6b317f8..d3b301e 100644
--- a/contracts/src/components/registry/registry.cairo
+++ b/contracts/src/components/registry/registry.cairo
@@ -1,7 +1,7 @@
 #[starknet::component]
 pub mod RegistryComponent {
     use core::num::traits::Zero;
-use starknet::storage::Map;
+    use starknet::storage::Map;
     use starknet::{ContractAddress, get_caller_address};
     use zkramp::components::registry::interface::OffchainId;
     use zkramp::components::registry::interface;
@@ -23,6 +23,23 @@ use starknet::storage::Map;
         pub const ZERO_ADDRESS_CALLER: felt252 = 'Caller is the zero address';
     }
 
+    //
+    // Registration Event
+    //
+
+    #[event]
+    #[derive(Drop, starknet::Event)]
+    pub enum Event {
+        RegistrationEvent: RegistrationEvent,
+    }
+
+    #[derive(Drop, starknet::Event)]
+    pub struct RegistrationEvent {
+        #[key]
+        caller: ContractAddress,
+        offchain_id: OffchainId,
+    }
+
     //
     // Registry impl
     //
@@ -48,7 +65,10 @@ use starknet::storage::Map;
             // TODO: caller a processor to verify the proof of registration
 
             // save registration
-            self.Registry_registrations.write((caller, offchain_id), true)
+            self.Registry_registrations.write((caller, offchain_id.clone()), true);
+
+            // emit registration event
+            self.emit(RegistrationEvent { caller : caller, offchain_id : offchain_id });
         }
     }
 }