diff --git a/score/mw/com/dependability/safety_analysis/root_causes/proxy/BUILD b/score/mw/com/dependability/safety_analysis/root_causes/proxy/BUILD
index 77a6f8c79..d4fa552d7 100644
--- a/score/mw/com/dependability/safety_analysis/root_causes/proxy/BUILD
+++ b/score/mw/com/dependability/safety_analysis/root_causes/proxy/BUILD
@@ -19,6 +19,7 @@ filegroup(
         "//score/mw/com/dependability/safety_analysis/root_causes/proxy/find_service:service_not_found_fta",
         "//score/mw/com/dependability/safety_analysis/root_causes/proxy/find_service:wrong_service_found_fta",
         "//score/mw/com/dependability/safety_analysis/root_causes/proxy/generic_proxy/generic_proxy_event/getsamplesize_from_generic_proxy_event:the_size_returned_is_bigger_then_the_actual_value_fta",
+        "//score/mw/com/dependability/safety_analysis/root_causes/proxy/generic_proxy/generic_proxy_event/has_serialized_format:wrong_indication_if_format_is_serialized_fta",
         "//score/mw/com/dependability/safety_analysis/root_causes/proxy/generic_proxy/getting_access_to_generic_proxy_events:map_containing_nonexistent_events_fta",
         "//score/mw/com/dependability/safety_analysis/root_causes/proxy/get_new_samples_on_an_event:callback_invoked_with_wrong_data_fta",
         "//score/mw/com/dependability/safety_analysis/root_causes/proxy/get_new_samples_on_an_event:callback_not_invoked_despite_samples_available_fta",
diff --git a/score/mw/com/dependability/safety_analysis/root_causes/proxy/generic_proxy/generic_proxy_event/has_serialized_format/BUILD b/score/mw/com/dependability/safety_analysis/root_causes/proxy/generic_proxy/generic_proxy_event/has_serialized_format/BUILD
new file mode 100644
index 000000000..8dba033ec
--- /dev/null
+++ b/score/mw/com/dependability/safety_analysis/root_causes/proxy/generic_proxy/generic_proxy_event/has_serialized_format/BUILD
@@ -0,0 +1,20 @@
+# *******************************************************************************
+# Copyright (c) 2026 Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+# *******************************************************************************
+
+filegroup(
+    name = "wrong_indication_if_format_is_serialized_fta",
+    srcs = [
+        "wrong_indication_if_format_is_serialized_fta.puml",
+    ],
+    visibility = ["//score/mw/com/dependability:__subpackages__"],
+)
diff --git a/score/mw/com/dependability/safety_analysis/root_causes/proxy/generic_proxy/generic_proxy_event/has_serialized_format/wrong_indication_if_format_is_serialized_fta.puml b/score/mw/com/dependability/safety_analysis/root_causes/proxy/generic_proxy/generic_proxy_event/has_serialized_format/wrong_indication_if_format_is_serialized_fta.puml
new file mode 100644
index 000000000..d9bb51d22
--- /dev/null
+++ b/score/mw/com/dependability/safety_analysis/root_causes/proxy/generic_proxy/generic_proxy_event/has_serialized_format/wrong_indication_if_format_is_serialized_fta.puml
@@ -0,0 +1,22 @@
+' *******************************************************************************
+' Copyright (c) 2026 Contributors to the Eclipse Foundation
+'
+' See the NOTICE file(s) distributed with this work for additional
+' information regarding copyright ownership.
+'
+' This program and the accompanying materials are made available under the
+' terms of the Apache License Version 2.0 which is available at
+' https://www.apache.org/licenses/LICENSE-2.0
+'
+' SPDX-License-Identifier: Apache-2.0
+' *******************************************************************************
+
+@startuml
+
+!include fta_metamodel.puml
+
+$FailureMode("Wrong indication, whether format is serialized", "Communication.WrongIndicationIfFormatIsSerialized")
+
+$RootCause("Wrong implementation", "IndicationWhetherFormatIsSerializedWronglyImplemented", "Communication.WrongIndicationIfFormatIsSerialized")
+
+@enduml