diff --git a/contract/contracts/hello-world/src/autoshare_logic.rs b/contract/contracts/hello-world/src/autoshare_logic.rs
index 9ffd706..951aa3c 100644
--- a/contract/contracts/hello-world/src/autoshare_logic.rs
+++ b/contract/contracts/hello-world/src/autoshare_logic.rs
@@ -1,7 +1,8 @@
 use crate::base::errors::Error;
 use crate::base::events::{
-    AdminTransferred, AutoshareCreated, AutoshareUpdated, ContractPaused, ContractUnpaused,
-    GroupActivated, GroupDeactivated, NotificationCategory, Withdrawal,
+    AdminTransferred, AuthorizationFailure, AutoshareCreated, AutoshareUpdated,
+    ContractPaused, ContractUnpaused, GroupActivated, GroupDeactivated,
+    NotificationCategory, Withdrawal,
 };
 use crate::base::types::{AutoShareDetails, GroupMember, PaymentHistory};
 use soroban_sdk::{contracttype, token, Address, BytesN, Env, String, Vec};
@@ -183,9 +184,12 @@ pub fn get_group_members(env: Env, id: BytesN<32>) -> Result<Vec<GroupMember>, E
 pub fn add_group_member(
     env: Env,
     id: BytesN<32>,
+    caller: Address,
     address: Address,
     percentage: u32,
 ) -> Result<(), Error> {
+    caller.require_auth();
+
     // Check if contract is paused
     if get_paused_status(&env) {
         return Err(Error::ContractPaused);
@@ -198,6 +202,11 @@ pub fn add_group_member(
         .get(&key)
         .ok_or(Error::NotFound)?;
 
+    if details.creator != caller {
+        publish_authorization_failure(&env, &caller, "add_group_member");
+        return Err(Error::Unauthorized);
+    }
+
     // Check if already a member
     for member in details.members.iter() {
         if member.address == address {
@@ -247,6 +256,15 @@ pub fn initialize_admin(env: Env, admin: Address) {
     }
 }
 
+fn publish_authorization_failure(env: &Env, caller: &Address, action: &str) {
+    AuthorizationFailure {
+        caller: caller.clone(),
+        category: NotificationCategory::Admin,
+        action: String::from_str(env, action),
+    }
+    .publish(env);
+}
+
 fn require_admin(env: &Env, caller: &Address) -> Result<(), Error> {
     let admin_key = DataKey::Admin;
     let admin: Address = env
@@ -256,6 +274,7 @@ fn require_admin(env: &Env, caller: &Address) -> Result<(), Error> {
         .ok_or(Error::Unauthorized)?;
 
     if admin != *caller {
+        publish_authorization_failure(env, caller, "require_admin");
         return Err(Error::Unauthorized);
     }
 
@@ -610,6 +629,7 @@ pub fn update_members(
         .ok_or(Error::NotFound)?;
 
     if details.creator != caller {
+        publish_authorization_failure(&env, &caller, "update_members");
         return Err(Error::Unauthorized);
     }
 
@@ -678,6 +698,7 @@ pub fn deactivate_group(env: Env, id: BytesN<32>, caller: Address) -> Result<(),
         .ok_or(Error::NotFound)?;
 
     if details.creator != caller {
+        publish_authorization_failure(&env, &caller, "deactivate_group");
         return Err(Error::Unauthorized);
     }
 
@@ -713,6 +734,7 @@ pub fn activate_group(env: Env, id: BytesN<32>, caller: Address) -> Result<(), E
         .ok_or(Error::NotFound)?;
 
     if details.creator != caller {
+        publish_authorization_failure(&env, &caller, "activate_group");
         return Err(Error::Unauthorized);
     }
 
diff --git a/contract/contracts/hello-world/src/base/events.rs b/contract/contracts/hello-world/src/base/events.rs
index a2d395c..9c97285 100644
--- a/contract/contracts/hello-world/src/base/events.rs
+++ b/contract/contracts/hello-world/src/base/events.rs
@@ -1,4 +1,4 @@
-use soroban_sdk::{contractevent, contracttype, Address, BytesN};
+use soroban_sdk::{contractevent, contracttype, Address, BytesN, String};
 
 /// High-level notification category attached to every emitted event.
 ///
@@ -108,3 +108,14 @@ pub struct Withdrawal {
     pub category: NotificationCategory,
     pub amount: i128,
 }
+
+/// Emitted when an authorization failure is detected by the contract.
+#[contractevent(data_format = "single-value")]
+#[derive(Clone)]
+pub struct AuthorizationFailure {
+    #[topic]
+    pub caller: Address,
+    #[topic]
+    pub category: NotificationCategory,
+    pub action: String,
+}
diff --git a/contract/contracts/hello-world/src/interfaces/autoshare.rs b/contract/contracts/hello-world/src/interfaces/autoshare.rs
index af766ba..61ff816 100644
--- a/contract/contracts/hello-world/src/interfaces/autoshare.rs
+++ b/contract/contracts/hello-world/src/interfaces/autoshare.rs
@@ -69,7 +69,13 @@ pub trait AutoShareTrait {
     fn get_group_members(env: Env, id: BytesN<32>) -> Vec<GroupMember>;
 
     /// Adds a member to a group with specified percentage.
-    fn add_group_member(env: Env, id: BytesN<32>, address: Address, percentage: u32);
+    fn add_group_member(
+        env: Env,
+        id: BytesN<32>,
+        caller: Address,
+        address: Address,
+        percentage: u32,
+    );
 
     /// Deactivates a group. Only the creator can deactivate.
     fn deactivate_group(env: Env, id: BytesN<32>, caller: Address);
diff --git a/contract/contracts/hello-world/src/lib.rs b/contract/contracts/hello-world/src/lib.rs
index 9b4f63f..6742f3c 100644
--- a/contract/contracts/hello-world/src/lib.rs
+++ b/contract/contracts/hello-world/src/lib.rs
@@ -109,8 +109,14 @@ impl AutoShareContract {
     }
 
     /// Adds a member to a group with specified percentage.
-    pub fn add_group_member(env: Env, id: BytesN<32>, address: Address, percentage: u32) {
-        autoshare_logic::add_group_member(env, id, address, percentage).unwrap();
+    pub fn add_group_member(
+        env: Env,
+        id: BytesN<32>,
+        caller: Address,
+        address: Address,
+        percentage: u32,
+    ) {
+        autoshare_logic::add_group_member(env, id, caller, address, percentage).unwrap();
     }
 
     /// Deactivates a group. Only the creator can deactivate.
diff --git a/contract/contracts/hello-world/src/tests/autoshare_test.rs b/contract/contracts/hello-world/src/tests/autoshare_test.rs
index 9b2b90e..65ad43c 100644
--- a/contract/contracts/hello-world/src/tests/autoshare_test.rs
+++ b/contract/contracts/hello-world/src/tests/autoshare_test.rs
@@ -602,6 +602,29 @@ fn test_add_group_member_success() {
     assert_eq!(final_members.get(2).unwrap().percentage, 34);
 }
 
+#[test]
+#[should_panic] // Unauthorized
+fn test_add_group_member_unauthorized() {
+    let test_env = setup_test_env();
+    let client = AutoShareContractClient::new(&test_env.env, &test_env.autoshare_contract);
+
+    let creator = test_env.users.get(0).unwrap().clone();
+    let id = BytesN::from_array(&test_env.env, &[1u8; 32]);
+    let name = String::from_str(&test_env.env, "Unauthorized Add Test");
+
+    let mut members = Vec::new(&test_env.env);
+    members.push_back(GroupMember {
+        address: Address::generate(&test_env.env),
+        percentage: 100,
+    });
+
+    create_helper(&client, &id, &name, &creator, &members, &test_env);
+
+    let other_user = Address::generate(&test_env.env);
+    let member_to_add = Address::generate(&test_env.env);
+    client.add_group_member(&id, &other_user, &member_to_add, &50);
+}
+
 #[test]
 #[should_panic] // AlreadyExists
 fn test_add_duplicate_member() {
@@ -622,7 +645,7 @@ fn test_add_duplicate_member() {
     create_helper(&client, &id, &name, &creator, &members, &test_env);
 
     // Try to add the same member again - should fail
-    client.add_group_member(&id, &member1, &50);
+    client.add_group_member(&id, &creator, &member1, &50);
 }
 
 #[test]
@@ -631,10 +654,11 @@ fn test_add_member_to_non_existent_group() {
     let test_env = setup_test_env();
     let client = AutoShareContractClient::new(&test_env.env, &test_env.autoshare_contract);
 
+    let creator = test_env.users.get(0).unwrap().clone();
     let id = BytesN::from_array(&test_env.env, &[99u8; 32]);
     let member = Address::generate(&test_env.env);
 
-    client.add_group_member(&id, &member, &50);
+    client.add_group_member(&id, &creator, &member, &50);
 }
 
 #[test]
@@ -659,7 +683,7 @@ fn test_add_member_invalid_total_percentage() {
 
     // Try to add another member with 50% (total would be 150%) - should fail
     let member2 = Address::generate(&test_env.env);
-    client.add_group_member(&id, &member2, &50);
+    client.add_group_member(&id, &creator, &member2, &50);
 }
 
 #[test]
diff --git a/contract/contracts/hello-world/src/tests/pause_test.rs b/contract/contracts/hello-world/src/tests/pause_test.rs
index 5005b07..60d6c94 100644
--- a/contract/contracts/hello-world/src/tests/pause_test.rs
+++ b/contract/contracts/hello-world/src/tests/pause_test.rs
@@ -181,7 +181,7 @@ fn test_add_member_fails_when_paused() {
     token_admin_client.mint(&creator, &10000000);
     client.create(&id, &name, &creator, &100u32, &token_address);
     client.pause(&admin);
-    client.add_group_member(&id, &member, &50u32);
+    client.add_group_member(&id, &creator, &member, &50u32);
 }
 
 #[test]