diff --git a/donation_sale/__init__.py b/donation_sale/__init__.py
index ec50cfc..69f7bab 100644
--- a/donation_sale/__init__.py
+++ b/donation_sale/__init__.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 from . import models
diff --git a/donation_sale/__manifest__.py b/donation_sale/__manifest__.py
index 0bbb3a8..0ce70d1 100644
--- a/donation_sale/__manifest__.py
+++ b/donation_sale/__manifest__.py
@@ -1,11 +1,10 @@
-# -*- coding: utf-8 -*-
 # © 2016 La Cimade (http://www.lacimade.org/)
 # @author: Alexis de Lattre <alexis.delattre@akretion.com>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 {
     'name': 'Donation Sale',
-    'version': '11.0.1.0.0',
+    'version': '12.0.1.0.0',
     'category': 'Accounting & Finance',
     'license': 'AGPL-3',
     'summary': 'Manage donations in sale orders',
diff --git a/donation_sale/models/__init__.py b/donation_sale/models/__init__.py
index 425c845..699ce1e 100644
--- a/donation_sale/models/__init__.py
+++ b/donation_sale/models/__init__.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 from . import account_invoice
diff --git a/donation_sale/models/account_invoice.py b/donation_sale/models/account_invoice.py
index c713d54..9707b8d 100644
--- a/donation_sale/models/account_invoice.py
+++ b/donation_sale/models/account_invoice.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # © 2016 La Cimade (http://www.lacimade.org/)
 # @author: Alexis de Lattre <alexis.delattre@akretion.com>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
diff --git a/donation_sale/models/donation_sale.py b/donation_sale/models/donation_sale.py
index 0899aaa..88ffde6 100644
--- a/donation_sale/models/donation_sale.py
+++ b/donation_sale/models/donation_sale.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # © 2016 La Cimade (http://www.lacimade.org/)
 # @author: Alexis de Lattre <alexis.delattre@akretion.com>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
diff --git a/donation_sale/models/sale.py b/donation_sale/models/sale.py
index 5cb7025..d70db38 100644
--- a/donation_sale/models/sale.py
+++ b/donation_sale/models/sale.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # © 2016 La Cimade (http://www.lacimade.org/)
 # @author: Alexis de Lattre <alexis.delattre@akretion.com>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
diff --git a/donation_sale/readme/CONTRIBUTORS.rst b/donation_sale/readme/CONTRIBUTORS.rst
new file mode 100644
index 0000000..320c6c6
--- /dev/null
+++ b/donation_sale/readme/CONTRIBUTORS.rst
@@ -0,0 +1,4 @@
+* Alexis de Lattre <alexis.delattre@akretion.com>
+* Serpent Consulting Services Pvt. Ltd. <support@serpentcs.com>
+* Nikul Chaudhary <nikul.chaudhary.serpentcs@gmail.com>
+
diff --git a/donation_sale/readme/DESCRIPTION.rst b/donation_sale/readme/DESCRIPTION.rst
new file mode 100644
index 0000000..3db3104
--- /dev/null
+++ b/donation_sale/readme/DESCRIPTION.rst
@@ -0,0 +1,3 @@
+To get some real features, you should install the *donation* or the *donation_sale* module.
+To understand the difference between these 2 modules,
+read `this post <https://github.com/OCA/donation/issues/22>`_.
diff --git a/donation_sale/tests/__init__.py b/donation_sale/tests/__init__.py
index ec17c15..4a0216c 100644
--- a/donation_sale/tests/__init__.py
+++ b/donation_sale/tests/__init__.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 from . import test_donation_sale
diff --git a/donation_sale/tests/test_donation_sale.py b/donation_sale/tests/test_donation_sale.py
index 16fb119..f3cc5ea 100644
--- a/donation_sale/tests/test_donation_sale.py
+++ b/donation_sale/tests/test_donation_sale.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # © 2018-Today Serpent Consulting Services Pvt. Ltd.
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 import time