diff --git a/pyzohoapi/books.py b/pyzohoapi/books.py
index 7e53250..cf21b7d 100644
--- a/pyzohoapi/books.py
+++ b/pyzohoapi/books.py
@@ -14,6 +14,7 @@ def Account(self, *args, **kwargs): return objecttypes.Account(self, *args, **kw
     def CompositeItem(self, *args, **kwargs): return objecttypes.CompositeItem(self, *args, **kwargs)
     def Contact(self, *args, **kwargs): return objecttypes.Contact(self, *args, **kwargs)
     def CustomerPayment(self, *args, **kwargs): return objecttypes.CustomerPayment(self, *args, **kwargs)
+    def CreditNote(self, *args, **kwargs): return objecttypes.CreditNote(self, *args, **kwargs)
     def Document(self, *args, **kwargs): return objecttypes.Document(self, *args, **kwargs)
     def Invoice(self, *args, **kwargs): return objecttypes.Invoice(self, *args, **kwargs)
     def Item(self, *args, **kwargs): return objecttypes.Item(self, *args, **kwargs)
diff --git a/pyzohoapi/inventory.py b/pyzohoapi/inventory.py
index c6be24b..92a078b 100644
--- a/pyzohoapi/inventory.py
+++ b/pyzohoapi/inventory.py
@@ -14,6 +14,7 @@ def Account(self, *args, **kwargs): return objecttypes.Account(self, *args, **kw
     def Bill(self, *args, **kwargs): return objecttypes.Bill(self, *args, **kwargs)
     def Brand(self, *args, **kwargs): return objecttypes.Brand(self, *args, **kwargs)
     def Bundle(self, *args, **kwargs): return objecttypes.Bundle(self, *args, **kwargs)
+    def CreditNote(self, *args, **kwargs): return objecttypes.CreditNote(self, *args, **kwargs)
     def CompositeItem(self, *args, **kwargs): return objecttypes.CompositeItem(self, *args, **kwargs)
     def Contact(self, *args, **kwargs): return objecttypes.Contact(self, *args, **kwargs)
     def CustomerPayment(self, *args, **kwargs): return objecttypes.CustomerPayment(self, *args, **kwargs)
diff --git a/pyzohoapi/objecttypes/__init__.py b/pyzohoapi/objecttypes/__init__.py
index 4160eaa..c190c85 100644
--- a/pyzohoapi/objecttypes/__init__.py
+++ b/pyzohoapi/objecttypes/__init__.py
@@ -3,7 +3,7 @@
 
 from pyzohoapi.objecttypes.mixins.CompositeItemOps import HasBundle
 from ..core import ZohoObjectBase
-from .mixins import HasActivate, HasAddresses, HasConfirm, HasCustomFields, HasDelivered, HasDraft, HasImage, HasVoid
+from .mixins import HasActivate, HasAddresses, HasConfirm, HasCustomFields, HasDelivered, HasDraft, HasImage, HasVoid, HasSent
 
 
 def ZohoObjectFactory(name,
@@ -49,13 +49,13 @@ def ZohoObjectFactory(name,
     responseKey="composite_item", idKey="composite_item_id",
     mixins=[HasActivate, HasBundle, HasCustomFields])
 Contact = ZohoObjectFactory("Contact", mixins=[HasActivate, HasAddresses, HasCustomFields])
-CreditNote = ZohoObjectFactory("CreditNode", mixins=[HasCustomFields])
+CreditNote = ZohoObjectFactory("CreditNote", mixins=[HasCustomFields])
 Currency = ZohoObjectFactory("Currency", urlPath="settings/currencies",
     pluralResponseKey="currencies")
 CustomerPayment = ZohoObjectFactory("CustomerPayment",
     idKey="payment_id", numberKey="payment_number", mixins=[HasCustomFields])
 Document = ZohoObjectFactory("Document", raw=True)
-Invoice = ZohoObjectFactory("Invoice", mixins=[HasCustomFields])
+Invoice = ZohoObjectFactory("Invoice", mixins=[HasCustomFields, HasDraft, HasVoid, HasSent])
 Item = ZohoObjectFactory("Item", mixins=[HasActivate, HasCustomFields, HasImage])
 ItemAdjustment = ZohoObjectFactory("ItemAdjustment",
     urlPath="inventoryadjustments", responseKey="inventory_adjustment",
diff --git a/pyzohoapi/objecttypes/mixins/__init__.py b/pyzohoapi/objecttypes/mixins/__init__.py
index a2c1f37..5f04af1 100644
--- a/pyzohoapi/objecttypes/mixins/__init__.py
+++ b/pyzohoapi/objecttypes/mixins/__init__.py
@@ -10,7 +10,7 @@
     'HasActivate',
     'HasAddresses',
     'HasBundle',
-    'HasConfirm', 'HasDraft', 'HasVoid', 'HasDelivered',
+    'HasConfirm', 'HasDraft', 'HasVoid', 'HasSent', 'HasDelivered',
     'HasCustomFields',
     'HasImage',
 ]
@@ -95,6 +95,13 @@ def Void(self):
             raise ZohoInvalidOpError("Void", self)
         return self._mark('void')
 
+class HasSent(_HasStatus):
+    """Adds `Sent()`"""
+    def Sent(self):
+        if not self._id:
+            raise ZohoInvalidOpError("Sent", self)
+        return self._mark('sent')
+
 
 class _HasAspect:
     def _updateAspect(self, aspect, aspect_id, data):