diff --git a/backend/app/services/telegram_templates.py b/backend/app/services/telegram_templates.py
index f67fbc0..bb2f776 100644
--- a/backend/app/services/telegram_templates.py
+++ b/backend/app/services/telegram_templates.py
@@ -95,7 +95,8 @@ def _line(emoji: str, label: str, value: str) -> str:
     return f"{emoji} {label}: {value}\n"
 
 
-def _event_generated_by(event: Event) -> str:
+def _event_content_author(event: Event) -> str:
+    """Кто сгенерировал содержимое события (ingest / отчёт)."""
     details = _details_dict(event)
     gb = details.get("generated_by")
     if isinstance(gb, str) and gb.strip().lower() in ("agent", "sac"):
@@ -108,6 +109,21 @@ def _event_generated_by(event: Event) -> str:
     return "agent"
 
 
+def _notification_delivered_by(event: Event) -> str:
+    """Кто доставил сообщение в Telegram (footer «📡 Оповещение»).
+
+    Шаблоны здесь используются только при отправке из SAC. Агент добавляет footer сам.
+    """
+    details = _details_dict(event)
+    via = details.get("telegram_via")
+    if isinstance(via, str) and via.strip().lower() in ("agent", "sac"):
+        return via.strip().lower()
+    if _event_content_author(event) == "sac":
+        return "sac"
+    # ingest от агента, канал Telegram — SAC (exclusive / notify_lifecycle)
+    return "sac"
+
+
 def _event_product_version(event: Event) -> tuple[str | None, str | None]:
     details = _details_dict(event)
     platform = None
@@ -137,12 +153,13 @@ def _event_product_version(event: Event) -> tuple[str | None, str | None]:
 
 
 def _append_event_source(html_msg: str, event: Event) -> str:
+    delivered = _notification_delivered_by(event)
     product, version = _event_product_version(event)
     return append_notification_source_html(
         html_msg,
-        generated_by=_event_generated_by(event),
-        product=product,
-        product_version=version,
+        generated_by=delivered,
+        product=product if delivered == "agent" else None,
+        product_version=version if delivered == "agent" else None,
     )
 
 
diff --git a/backend/tests/test_daily_report.py b/backend/tests/test_daily_report.py
index bbfd75e..98e17ef 100644
--- a/backend/tests/test_daily_report.py
+++ b/backend/tests/test_daily_report.py
@@ -248,7 +248,7 @@ def test_daily_report_telegram_html_uses_report_html(db_session):
         payload={},
     )
     assert format_event_telegram_html(event) == (
-        "<b>📊 OK</b>\nline\n📡 Оповещение: агент (ssh-monitor)"
+        "<b>📊 OK</b>\nline\n📡 Оповещение: SAC (Security Alert Center)"
     )
 
 
diff --git a/backend/tests/test_telegram_templates.py b/backend/tests/test_telegram_templates.py
index dcd7584..b1884c3 100644
--- a/backend/tests/test_telegram_templates.py
+++ b/backend/tests/test_telegram_templates.py
@@ -65,7 +65,7 @@ def test_rdp_success_template():
     text = format_event_telegram_html(event)
     assert "УСПЕШНЫЙ" in text
     assert "Сеть/RDP" in text
-    assert "📡 Оповещение: агент" in text
+    assert "📡 Оповещение: SAC (Security Alert Center)" in text
 
 
 def test_event_telegram_includes_sac_source_for_sac_daily_report():
@@ -107,7 +107,26 @@ def test_lifecycle_started_template():
     assert "K6A-DC3" in text
     assert "1.2.30-SAC" in text
     assert "загрузка ОС" in text
-    assert "📡 Оповещение: агент" in text
+    assert "📡 Оповещение: SAC (Security Alert Center)" in text
+
+
+def test_lifecycle_footer_uses_telegram_via_agent_when_present():
+    host = Host(hostname="WIN01", display_name="H1", os_family="windows")
+    event = Event(
+        event_id="00000000-0000-4000-8000-000000000506",
+        host_id=1,
+        host=host,
+        occurred_at=datetime(2026, 5, 29, 9, 0, tzinfo=timezone.utc),
+        category="agent",
+        type="agent.lifecycle",
+        severity="info",
+        title="started",
+        summary="x",
+        details={"lifecycle": "started", "telegram_via": "agent"},
+        payload={"source": {"product": "rdp-login-monitor", "product_version": "1.2.30-SAC"}},
+    )
+    text = format_event_telegram_html(event)
+    assert "📡 Оповещение: агент (rdp-login-monitor 1.2.30-SAC)" in text
 
 
 def test_rdp_shadow_control_template():