diff --git a/cardano/backends/walletrest/__init__.py b/cardano/backends/walletrest/__init__.py
index bf11934..8d99b5b 100644
--- a/cardano/backends/walletrest/__init__.py
+++ b/cardano/backends/walletrest/__init__.py
@@ -40,6 +40,9 @@ class WalletREST(object):
             "non_null_rewards": main_exceptions.NonNullRewards,
             "cannot_cover_fee": main_exceptions.CannotCoverFee,
         },
+        409: {
+            "wallet_already_exists": main_exceptions.WalletAlreadyExists,
+        },
         500: {
             "created_invalid_transaction": exceptions.CreatedInvalidTransaction,
         },
@@ -76,7 +79,7 @@ def raw_request(self, method, path, params=None):
             _log.debug(u"No result (HTTP 204)")
         if rsp.status_code == 400:
             raise exceptions.BadRequest(result["message"], result=result)
-        if rsp.status_code == 403:
+        if rsp.status_code in (403, 409):
             try:
                 raise self.ERR2EXCEPTION[rsp.status_code][result["code"]](
                     result["message"]
diff --git a/cardano/exceptions.py b/cardano/exceptions.py
index 6638c7c..356e56c 100644
--- a/cardano/exceptions.py
+++ b/cardano/exceptions.py
@@ -10,6 +10,18 @@ class BackendException(CardanoException):
     pass
 
 
+class WalletServiceException(CardanoException):
+    """The base exception for wallet service errors."""
+
+    pass
+
+
+class WalletAlreadyExists(WalletServiceException):
+    """Raised when a duplicate wallet is requested to be created at the service."""
+
+    pass
+
+
 class WalletException(CardanoException):
     """The base exception for wallet errors."""