1 files changed, 3 insertions, 0 deletions
diff --git a/synapse/handlers/devicemessage.py b/synapse/handlers/devicemessage.py
index 2b034dcbb7..79be7c97c8 100644
--- a/synapse/handlers/devicemessage.py
+++ b/synapse/handlers/devicemessage.py
@@ -104,6 +104,9 @@ class DeviceMessageHandler:
         """
         Handle receiving to-device messages from remote homeservers.
 
+        Note that any errors thrown from this method will cause the federation /send
+        request to receive an error response.
+
         Args:
             origin: The remote homeserver.
             content: The JSON dictionary containing the to-device messages.