diff --git a/api/axis.py b/api/axis.py
index 3ef0d210ab..38d2edcd32 100644
--- a/api/axis.py
+++ b/api/axis.py
@@ -1703,7 +1703,8 @@ def _parse(self, parsed: dict[str, Any], **kwargs: Any) -> T:
 class Axis360FulfillmentInfoResponseParser(
     JSONResponseParser[
         tuple[Union[FindawayManifest, "AxisNowManifest"], datetime.datetime]
-    ]
+    ],
+    LoggerMixin,
 ):
     """Parse JSON documents into Findaway audiobook manifests or AxisNow manifests."""
 
@@ -1771,6 +1772,19 @@ def parse_findaway(
         sessionKey = k("FNDSessionKey", parsed)
         checkoutId = k("FNDTransactionID", parsed)
 
+        if sessionKey == "Expired":
+            if license_pool.identifier is None:
+                identifier = f"LicensePool {license_pool.id}"
+            else:
+                identifier = f"{license_pool.identifier.type}/{license_pool.identifier.identifier}"
+
+            message = f"Expired findaway session key for {identifier}. Request data: {json.dumps(parsed)}"
+            self.log.error(message)
+            raise RemoteInitiatedServerError(
+                message,
+                self.SERVICE_NAME,
+            )
+
         # Acquire the TOC information
         metadata_response = self.api.get_audiobook_metadata(fulfillmentId)
         parser = AudiobookMetadataParser()
diff --git a/tests/api/test_axis.py b/tests/api/test_axis.py
index dd25b36d2e..97c5df94b1 100644
--- a/tests/api/test_axis.py
+++ b/tests/api/test_axis.py
@@ -1639,6 +1639,13 @@ def get_data():
             m(bad_date, license_pool=pool)
         assert "Could not parse expiration date: not-a-date" in str(excinfo.value)
 
+        # Try with an expired session key.
+        expired_session_key = get_data()
+        expired_session_key["FNDSessionKey"] = "Expired"
+        with pytest.raises(RemoteInitiatedServerError) as excinfo:
+            m(expired_session_key, license_pool=pool)
+        assert "Expired findaway session key" in str(excinfo.value)
+
     def test__parse_axisnow(self, axis360parsers: Axis360FixturePlusParsers) -> None:
         # _parse will create a valid AxisNowManifest given a
         # complete document.