diff --git a/kmip/pie/client.py b/kmip/pie/client.py
index fb23db4..c36d4b2 100644
--- a/kmip/pie/client.py
+++ b/kmip/pie/client.py
@@ -391,7 +391,7 @@ class ProxyKmipClient(api.KmipClient):
             message = result.result_message.value
             raise exceptions.KmipOperationFailure(status, reason, message)
 
-    def get(self, uid):
+    def get(self, uid=None):
         """
         Get a managed object from a KMIP appliance.
 
@@ -407,8 +407,9 @@ class ProxyKmipClient(api.KmipClient):
             TypeError: if the input argument is invalid
         """
         # Check input
-        if not isinstance(uid, six.string_types):
-            raise TypeError("uid must be a string")
+        if uid is not None:
+            if not isinstance(uid, six.string_types):
+                raise TypeError("uid must be a string")
 
         # Verify that operations can be given at this time
         if not self._is_open:
@@ -541,7 +542,7 @@ class ProxyKmipClient(api.KmipClient):
             message = result.result_message.value
             raise exceptions.KmipOperationFailure(status, reason, message)
 
-    def destroy(self, uid):
+    def destroy(self, uid=None):
         """
         Destroy a managed object stored by a KMIP appliance.
 
@@ -557,8 +558,9 @@ class ProxyKmipClient(api.KmipClient):
             TypeError: if the input argument is invalid
         """
         # Check input
-        if not isinstance(uid, six.string_types):
-            raise TypeError("uid must be a string")
+        if uid is not None:
+            if not isinstance(uid, six.string_types):
+                raise TypeError("uid must be a string")
 
         # Verify that operations can be given at this time
         if not self._is_open:
diff --git a/kmip/services/kmip_client.py b/kmip/services/kmip_client.py
index 8203b5c..a9edb11 100644
--- a/kmip/services/kmip_client.py
+++ b/kmip/services/kmip_client.py
@@ -357,7 +357,7 @@ class KMIPProxy(KMIP):
                             revocation_message=message,
                             credential=credential)
 
-    def destroy(self, uuid, credential=None):
+    def destroy(self, uuid=None, credential=None):
         return self._destroy(unique_identifier=uuid,
                              credential=credential)