diff --git a/threescale_api/resources.py b/threescale_api/resources.py
index 312d924..f086afc 100644
--- a/threescale_api/resources.py
+++ b/threescale_api/resources.py
@@ -890,6 +890,17 @@ def charge(self, entity_id: int):
         return instance
 
 
+class PaymentTransactions(DefaultClient):
+    def __init__(self, *args, entity_name='payment_transaction',
+                 entity_collection='payment_transactions', **kwargs):
+        super().__init__(*args, entity_name=entity_name,
+                         entity_collection=entity_collection, **kwargs)
+
+    @property
+    def url(self) -> str:
+        return self.parent.url + '/payment_transactions'
+
+
 class FieldsDefinitions(DefaultClient):
     def __init__(self, *args, entity_name='fields_definition',
                  entity_collection='fields_definitions', **kwargs):
@@ -1252,6 +1263,16 @@ def applications(self) -> Applications:
     def users(self) -> AccountUsers:
         return AccountUsers(parent=self, instance_klass=AccountUser)
 
+    def credit_card_set(self, params: dict = None, **kwargs):
+        url = self.url + "/credit_card"
+        response = self.client.rest.put(url=url, json=params, **kwargs)
+        return response
+
+    def credit_card_delete(self, params: dict = None, **kwargs):
+        url = self.url + "/credit_card"
+        response = self.client.rest.delete(url=url, json=params, **kwargs)
+        return response
+
 
 class UserPermissions(DefaultResource):
     pass
@@ -1416,6 +1437,15 @@ def state_update(self, state: InvoiceState):
     def charge(self):
         return self.client.charge(entity_id=self.entity_id)
 
+    @property
+    def payment_transactions(self) -> 'PaymentTransactions':
+        return PaymentTransactions(parent=self, instance_klass=PaymentTransaction)
+
+
+class PaymentTransaction(DefaultResource):
+    def __init__(self, entity_name='name', **kwargs):
+        super().__init__(entity_name=entity_name, **kwargs)
+
 
 class FieldsDefinition(DefaultResource):
     def __init__(self, entity_name='name', **kwargs):