diff --git a/src/a2a/server/apps/jsonrpc/jsonrpc_app.py b/src/a2a/server/apps/jsonrpc/jsonrpc_app.py
index e0b638879..4f158da8e 100644
--- a/src/a2a/server/apps/jsonrpc/jsonrpc_app.py
+++ b/src/a2a/server/apps/jsonrpc/jsonrpc_app.py
@@ -219,14 +219,6 @@ def __init__(  # noqa: PLR0913
             extended_agent_card=extended_agent_card,
             extended_card_modifier=extended_card_modifier,
         )
-        if (
-            self.agent_card.supports_authenticated_extended_card
-            and self.extended_agent_card is None
-            and self.extended_card_modifier is None
-        ):
-            logger.error(
-                'AgentCard.supports_authenticated_extended_card is True, but no extended_agent_card was provided. The /agent/authenticatedExtendedCard endpoint will return 404.'
-            )
         self._context_builder = context_builder or DefaultCallContextBuilder()
 
     def _generate_error_response(
diff --git a/src/a2a/server/apps/rest/rest_adapter.py b/src/a2a/server/apps/rest/rest_adapter.py
index c34d10fa4..40a4aacbc 100644
--- a/src/a2a/server/apps/rest/rest_adapter.py
+++ b/src/a2a/server/apps/rest/rest_adapter.py
@@ -94,14 +94,6 @@ def __init__(  # noqa: PLR0913
         self.handler = RESTHandler(
             agent_card=agent_card, request_handler=http_handler
         )
-        if (
-            self.agent_card.supports_authenticated_extended_card
-            and self.extended_agent_card is None
-            and self.extended_card_modifier is None
-        ):
-            logger.error(
-                'AgentCard.supports_authenticated_extended_card is True, but no extended_agent_card was provided. The /agent/authenticatedExtendedCard endpoint will return 404.'
-            )
         self._context_builder = context_builder or DefaultCallContextBuilder()
 
     @rest_error_handler