diff --git a/examples/getting-started/conversation/send_handle_incoming_sms/.env.example b/examples/getting-started/conversation/send_handle_incoming_sms/.env.example
index 9716be1..af1dc36 100644
--- a/examples/getting-started/conversation/send_handle_incoming_sms/.env.example
+++ b/examples/getting-started/conversation/send_handle_incoming_sms/.env.example
@@ -6,11 +6,7 @@ SINCH_KEY_SECRET=
 # Conversation API: existing app (already created and configured for SMS).
 # SINCH_CONVERSATION_REGION is required.
 # Set it to the same region as the one your app was created in (e.g. eu).
-CONVERSATION_APP_ID=
 SINCH_CONVERSATION_REGION=
 
-# Webhook secret (set when configuring the callback in Sinch dashboard)
-CONVERSATION_WEBHOOKS_SECRET=
-
 # Server
 SERVER_PORT=3001
diff --git a/examples/getting-started/conversation/send_handle_incoming_sms/README.md b/examples/getting-started/conversation/send_handle_incoming_sms/README.md
index ee2fda8..b9a5e5e 100644
--- a/examples/getting-started/conversation/send_handle_incoming_sms/README.md
+++ b/examples/getting-started/conversation/send_handle_incoming_sms/README.md
@@ -29,18 +29,11 @@ see that the MO was received and processed.
    SINCH_KEY_SECRET=your_key_secret
    ```
 
-   - Conversation API app (existing app, already configured for SMS). Set `SINCH_CONVERSATION_REGION` to the same region as the one your app was created in (e.g. `eu`):
+   - Conversation API: set `SINCH_CONVERSATION_REGION` to the same region as the one your app was created in (e.g. `eu`).
    ```
-   CONVERSATION_APP_ID=your_conversation_app_id
    SINCH_CONVERSATION_REGION=
    ```
 
-   - Webhook secret (the value you set when configuring the callback URL for this app).  
-   See [Conversation API callbacks](https://developers.sinch.com/docs/conversation/callbacks):
-   ```
-   CONVERSATION_WEBHOOKS_SECRET=your_webhook_secret
-   ```
-
    - Server port (optional; default 3001):
    ```
    SERVER_PORT=3001
@@ -92,8 +85,7 @@ Forwarding    https://abc123.ngrok-free.app -> http://localhost:3001
 Use the **HTTPS** URL when configuring the callback:  
 `https://<your-ngrok-host>/ConversationEvent`
 
-Configure this callback URL (and the webhook secret) in the Sinch dashboard for your Conversation API app.  
-The webhook secret must match `CONVERSATION_WEBHOOKS_SECRET` in your `.env`.
+Configure this callback URL in the Sinch dashboard for your Conversation API app.
 
 ### Sending an SMS to your Sinch number
 
diff --git a/examples/getting-started/conversation/send_handle_incoming_sms/controller.py b/examples/getting-started/conversation/send_handle_incoming_sms/controller.py
index bc1d717..e581646 100644
--- a/examples/getting-started/conversation/send_handle_incoming_sms/controller.py
+++ b/examples/getting-started/conversation/send_handle_incoming_sms/controller.py
@@ -3,34 +3,20 @@
 
 
 class ConversationController:
-    def __init__(self, sinch_client, webhooks_secret, app_id):
+    def __init__(self, sinch_client):
         self.sinch_client = sinch_client
-        self.webhooks_secret = webhooks_secret
-        self.app_id = app_id
         self.logger = self.sinch_client.configuration.logger
 
     def conversation_event(self):
         headers = dict(request.headers)
         raw_body = getattr(request, "raw_body", None) or b""
 
-        webhooks_service = self.sinch_client.conversation.webhooks(self.webhooks_secret)
-
-        # Set to True to enforce signature validation (recommended in production)
-        ensure_valid_signature = False
-        if ensure_valid_signature:
-            valid = webhooks_service.validate_authentication_header(
-                headers=headers,
-                json_payload=raw_body,
-            )
-            if not valid:
-                return Response(status=401)
-
+        webhooks_service = self.sinch_client.conversation.webhooks()
         event = webhooks_service.parse_event(raw_body, headers)
         handle_conversation_event(
             event=event,
             logger=self.logger,
             sinch_client=self.sinch_client,
-            app_id=self.app_id,
         )
 
         return Response(status=200)
diff --git a/examples/getting-started/conversation/send_handle_incoming_sms/server.py b/examples/getting-started/conversation/send_handle_incoming_sms/server.py
index 6582205..f580522 100644
--- a/examples/getting-started/conversation/send_handle_incoming_sms/server.py
+++ b/examples/getting-started/conversation/send_handle_incoming_sms/server.py
@@ -21,8 +21,6 @@ def load_config():
 
 config = load_config()
 port = int(config.get("SERVER_PORT") or "3001")
-app_id = config.get("CONVERSATION_APP_ID") or ""
-webhooks_secret = config.get("CONVERSATION_WEBHOOKS_SECRET") or ""
 conversation_region = (config.get("SINCH_CONVERSATION_REGION") or "").strip()
 if not conversation_region:
     raise ValueError(
@@ -39,9 +37,7 @@ def load_config():
 logging.basicConfig()
 sinch_client.configuration.logger.setLevel(logging.INFO)
 
-conversation_controller = ConversationController(
-    sinch_client, webhooks_secret, app_id
-)
+conversation_controller = ConversationController(sinch_client)
 
 
 @app.before_request
@@ -57,6 +53,5 @@ def before_request():
 
 if __name__ == "__main__":
     print("Getting Started: MO SMS → MT reply (Conversation API, DISPATCH, channel identity)")
-    print(f"App ID: {app_id or '(set CONVERSATION_APP_ID in .env)'}")
     print(f"Listening on port {port}. Expose with: ngrok http {port}")
     app.run(port=port)
diff --git a/examples/getting-started/conversation/send_handle_incoming_sms/server_business_logic.py b/examples/getting-started/conversation/send_handle_incoming_sms/server_business_logic.py
index 506f9f7..2810787 100644
--- a/examples/getting-started/conversation/send_handle_incoming_sms/server_business_logic.py
+++ b/examples/getting-started/conversation/send_handle_incoming_sms/server_business_logic.py
@@ -6,11 +6,11 @@
 from sinch.domains.conversation.models.v1.webhooks import MessageInboundEvent
 
 
-def handle_conversation_event(event, logger, sinch_client, app_id):
+def handle_conversation_event(event, logger, sinch_client):
     """Webhook entry: handle only MESSAGE_INBOUND; delegate to inbound handler."""
     if not isinstance(event, MessageInboundEvent):
         return
-    _handle_message_inbound(event, logger, sinch_client, app_id)
+    _handle_message_inbound(event, logger, sinch_client)
 
 
 def _get_mo_text(event: MessageInboundEvent) -> str:
@@ -22,7 +22,7 @@ def _get_mo_text(event: MessageInboundEvent) -> str:
     return "(no text content)"
 
 
-def _handle_message_inbound(event: MessageInboundEvent, logger, sinch_client, app_id):
+def _handle_message_inbound(event: MessageInboundEvent, logger, sinch_client):
     """Parse MO, then send MT echo to the same number via Conversation API."""
     msg = event.message
     channel_identity = msg.channel_identity
@@ -34,8 +34,9 @@ def _handle_message_inbound(event: MessageInboundEvent, logger, sinch_client, ap
     mo_text = _get_mo_text(event)
     logger.info("MO SMS from %s: %s", identity, mo_text)
 
+    app_id = event.app_id
     if not app_id:
-        logger.warning("CONVERSATION_APP_ID not set; skipping MT reply.")
+        logger.warning("Event has no app_id; skipping MT reply.")
         return
 
     reply_text = f"Your message said: {mo_text}"
diff --git a/sinch/domains/conversation/conversation.py b/sinch/domains/conversation/conversation.py
index b85cff2..f9f0668 100644
--- a/sinch/domains/conversation/conversation.py
+++ b/sinch/domains/conversation/conversation.py
@@ -14,7 +14,7 @@ def __init__(self, sinch):
         self._sinch = sinch
         self.messages = Messages(self._sinch)
 
-    def webhooks(self, callback_secret: str) -> ConversationWebhooks:
+    def webhooks(self, callback_secret: str = "") -> ConversationWebhooks:
         """
         Create a Conversation API webhooks handler with the given webhook secret.