diff --git a/planetmint/transactions/common/transaction.py b/planetmint/transactions/common/transaction.py
index a0e6628..368c7e0 100644
--- a/planetmint/transactions/common/transaction.py
+++ b/planetmint/transactions/common/transaction.py
@@ -105,7 +105,7 @@ class Transaction(object):
         # dicts holding a `data` property. Asset payloads for 'TRANSFER'
         # operations must be dicts holding an `id` property.
 
-        # Changes: CREATE needs list of 1 asset that holds data in asset or None
+        # NOTE: Changes: CREATE needs list of 1 asset that holds data in asset or None
         if (operation == self.CREATE and
                 assets is not None and not (isinstance(assets, list) and 'data' in assets[0])):
             raise TypeError(('`asset` must be None or a list of length 1 with a dict holding a `data` '
@@ -114,10 +114,14 @@ class Transaction(object):
         #         asset is not None and not (isinstance(asset, dict) and 'data' in asset)):
         #     raise TypeError(('`asset` must be None or a dict holding a `data` '
         #                      " property instance for '{}' Transactions".format(operation)))
+        # NOTE: Changes: TRANSFER needs a list of at least on asset that holds id in each asset
         elif (operation == self.TRANSFER and
-                not (isinstance(assets, dict) and 'id' in assets)):
-            raise TypeError(('`asset` must be a dict holding an `id` property '
-                             'for \'TRANSFER\' Transactions'))
+                assets is not None and not (isinstance(assets, list) and all('id' in asset for asset in assets))):
+            raise TypeError(('`asset` must be a list containing dicts holding an `id` property'))
+        # elif (operation == self.TRANSFER and
+        #         not (isinstance(assets, dict) and 'id' in assets)):
+        #     raise TypeError(('`asset` must be a dict holding an `id` property '
+        #                      'for \'TRANSFER\' Transactions'))
 
         if outputs and not isinstance(outputs, list):
             raise TypeError('`outputs` must be a list instance or None')
@@ -567,7 +571,7 @@ class Transaction(object):
         return Transaction._to_str(tx)
 
     @classmethod
-    def get_asset_id(cls, transactions):
+    def get_asset_ids(cls, transactions):
         """Get the asset id from a list of :class:`~.Transactions`.
 
         This is useful when we want to check if the multiple inputs of a
@@ -607,7 +611,7 @@ class Transaction(object):
             else:
                 asset_ids.extend([asset['id'] for asset in tx.assets])
 
-        return asset_ids.pop()
+        return asset_ids
 
     @staticmethod
     def validate_id(tx_body):
diff --git a/tests/assets/test_digital_assets.py b/tests/assets/test_digital_assets.py
index d676c51..cd44a16 100644
--- a/tests/assets/test_digital_assets.py
+++ b/tests/assets/test_digital_assets.py
@@ -23,7 +23,7 @@ def test_validate_transfer_asset_id_mismatch(b, signed_create_tx, user_pk, user_
     from planetmint.transactions.common.exceptions import AssetIdMismatch
 
     tx_transfer = Transfer.generate(signed_create_tx.to_inputs(), [([user_pk], 1)],
-                                       signed_create_tx.id)
+                                       [signed_create_tx.id])
     tx_transfer.asset['id'] = 'a' * 64
     tx_transfer_signed = tx_transfer.sign([user_sk])
 
@@ -36,15 +36,15 @@ def test_validate_transfer_asset_id_mismatch(b, signed_create_tx, user_pk, user_
 def test_get_asset_id_create_transaction(alice, user_pk):
     from planetmint.models import Transaction
     tx_create = Create.generate([alice.public_key], [([user_pk], 1)])
-    assert Transaction.get_asset_id(tx_create) == tx_create.id
+    assert Transaction.get_asset_ids(tx_create) == tx_create.id
 
 
 def test_get_asset_id_transfer_transaction(b, signed_create_tx, user_pk):
     from planetmint.models import Transaction
 
     tx_transfer = Transfer.generate(signed_create_tx.to_inputs(), [([user_pk], 1)],
-                                       signed_create_tx.id)
-    asset_id = Transaction.get_asset_id(tx_transfer)
+                                       [signed_create_tx.id])
+    asset_id = Transaction.get_asset_ids(tx_transfer)
     assert asset_id == tx_transfer.asset['id']
 
 # This test is not relevant anymore
@@ -60,7 +60,7 @@ def test_asset_id_mismatch(alice, user_pk):
     tx2.sign([alice.private_key])
 
     with pytest.raises(AssetIdMismatch):
-        Transaction.get_asset_id([tx1, tx2])
+        Transaction.get_asset_ids([tx1, tx2])
 
 
 def test_create_valid_divisible_asset(b, user_pk, user_sk):
diff --git a/tests/backend/localmongodb/test_queries.py b/tests/backend/localmongodb/test_queries.py
index 80abb5d..41af7ab 100644
--- a/tests/backend/localmongodb/test_queries.py
+++ b/tests/backend/localmongodb/test_queries.py
@@ -26,7 +26,7 @@ def test_get_txids_filtered(signed_create_tx, signed_transfer_tx):
     conn.db.transactions.insert_one(signed_create_tx.to_dict())
     conn.db.transactions.insert_one(signed_transfer_tx.to_dict())
 
-    asset_id = Transaction.get_asset_id([signed_create_tx, signed_transfer_tx])
+    asset_id = Transaction.get_asset_ids([signed_create_tx, signed_transfer_tx])
 
     # Test get by just asset id
     txids = set(query.get_txids_filtered(conn, asset_id))