diff --git a/contract/data/mail_message_subtype.xml b/contract/data/mail_message_subtype.xml
index 1aff7f624..fd380d922 100644
--- a/contract/data/mail_message_subtype.xml
+++ b/contract/data/mail_message_subtype.xml
@@ -7,5 +7,6 @@
     <record id="mail_message_subtype_contract_modification" model="mail.message.subtype">
         <field name="name">Contract modifications</field>
         <field name="res_model">contract.contract</field>
+        <field name="default" eval="False"/>
     </record>
 </odoo>
diff --git a/contract/data/mail_template.xml b/contract/data/mail_template.xml
index 647ac5978..dac85a782 100644
--- a/contract/data/mail_template.xml
+++ b/contract/data/mail_template.xml
@@ -62,22 +62,39 @@
 </div>
         ]]></field>
     </record>
-    <template id="template_contract_modification" name="Contract Modification">
-        <t t-call="email_template_qweb.view_email_template_corporate_identity">
+
+    <record id="mail_template_contract_modification" model="mail.template">
+        <field name="name">Contract Modification Template</field>
+        <field name="email_from">${(object.user_id.email and '%s &lt;%s&gt;' % (object.user_id.name, object.user_id.email) or '')|safe}</field>
+        <field name="subject">${object.company_id.name} Contract (Ref ${object.name or 'n/a'}) - Modifications</field>
+        <field name="model_id" ref="model_contract_contract"/>
+        <field name="lang">${object.partner_id.lang}</field>
+        <field name="body_html"><![CDATA[
             <p>Hello</p>
-            <p>We have modifications on the contract <strong t-esc="object.name" /> that we want to notify you.</p>
-            <table border="1">
+            <p>We have modifications on the contract that we want to notify you.</p>
+        ]]></field>
+    </record>
+
+    <template id="mail_notification_contract" inherit_id="mail.mail_notification_paynow" primary="True">
+        <xpath expr="//t[@t-raw='message.body']" position="after">
+            <t t-raw="0"/>
+        </xpath>
+    </template>
+
+    <template id="template_contract_modification" name="Contract Modification">
+        <t t-call="contract.mail_notification_contract">
+            <table border="1" align="center">
                 <thead>
                     <tr>
-                        <th>Date</th>
-                        <th>Description</th>
+                        <th name="th_date">Date</th>
+                        <th name="th_description">Description</th>
                     </tr>
                 </thead>
                 <tbody>
-                    <t t-foreach="object.modification_ids" t-as="notification_id">
-                        <tr t-if="not notification_id.sent">
-                            <td><span t-field="notification_id.date" /></td>
-                            <td><div t-field="notification_id.description" /></td>
+                    <t t-foreach="record.modification_ids" t-as="modification">
+                        <tr t-if="not modification.sent">
+                            <td name="td_date"><span t-field="modification.date" /></td>
+                            <td name="td_description"><div t-field="modification.description" /></td>
                         </tr>
                     </t>
                 </tbody>
diff --git a/contract/i18n/contract.pot b/contract/i18n/contract.pot
index ba063a51f..d3399a5ad 100644
--- a/contract/i18n/contract.pot
+++ b/contract/i18n/contract.pot
@@ -6,8 +6,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Odoo Server 12.0\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2020-12-23 16:39+0000\n"
-"PO-Revision-Date: 2020-12-23 16:39+0000\n"
+"POT-Creation-Date: 2020-12-24 08:24+0000\n"
+"PO-Revision-Date: 2020-12-24 08:24+0000\n"
 "Last-Translator: <>\n"
 "Language-Team: \n"
 "MIME-Version: 1.0\n"
@@ -15,6 +15,14 @@ msgstr ""
 "Content-Transfer-Encoding: \n"
 "Plural-Forms: \n"
 
+#. module: contract
+#: model:mail.template,body_html:contract.mail_template_contract_modification
+msgid "\n"
+"            <p>Hello</p>\n"
+"            <p>We have modifications on the contract that we want to notify you.</p>\n"
+"        "
+msgstr ""
+
 #. module: contract
 #: model:mail.template,body_html:contract.email_contract_template
 msgid "\n"
@@ -74,6 +82,11 @@ msgstr ""
 msgid "${object.company_id.name} Contract (Ref ${object.name or 'n/a'})"
 msgstr ""
 
+#. module: contract
+#: model:mail.template,subject:contract.mail_template_contract_modification
+msgid "${object.company_id.name} Contract (Ref ${object.name or 'n/a'}) - Modifications"
+msgstr ""
+
 #. module: contract
 #: model_terms:ir.ui.view,arch_db:contract.contract_manually_create_invoice_form_view
 msgid "<span attrs=\"{'invisible': [('contract_to_invoice_count', '&gt;', 1)]}\">\n"
@@ -411,7 +424,7 @@ msgid "Company"
 msgstr ""
 
 #. module: contract
-#: code:addons/contract/models/contract.py:436
+#: code:addons/contract/models/contract.py:441
 #, python-format
 msgid "Compose Email"
 msgstr ""
@@ -638,7 +651,7 @@ msgid "Contract lines"
 msgstr ""
 
 #. module: contract
-#: code:addons/contract/models/contract.py:592
+#: code:addons/contract/models/contract.py:597
 #, python-format
 msgid "Contract manually invoiced: <a href=\"#\" data-oe-model=\"%s\" data-oe-id=\"%s\">Invoice</a>"
 msgstr ""
@@ -767,6 +780,7 @@ msgstr ""
 #: model:ir.model.fields,field_description:contract.field_contract_modification__date
 #: model_terms:ir.ui.view,arch_db:contract.portal_my_contracts
 #: model_terms:ir.ui.view,arch_db:contract.report_contract_document
+#: model_terms:ir.ui.view,arch_db:contract.template_contract_modification
 #, python-format
 msgid "Date"
 msgstr ""
@@ -926,11 +940,6 @@ msgstr ""
 msgid "Group By..."
 msgstr ""
 
-#. module: contract
-#: model_terms:ir.ui.view,arch_db:contract.template_contract_modification
-msgid "Hello"
-msgstr ""
-
 #. module: contract
 #: model:ir.model.fields,field_description:contract.field_contract_abstract_contract__id
 #: model:ir.model.fields,field_description:contract.field_contract_abstract_contract_line__id
@@ -1357,7 +1366,7 @@ msgid "Planned"
 msgstr ""
 
 #. module: contract
-#: code:addons/contract/models/contract.py:394
+#: code:addons/contract/models/contract.py:399
 #, python-format
 msgid "Please define a %s journal for the company '%s'."
 msgstr ""
@@ -1591,7 +1600,6 @@ msgstr ""
 
 #. module: contract
 #: model:ir.model.fields,field_description:contract.field_contract_line__state
-#: model_terms:ir.ui.view,arch_db:contract.template_contract_modification
 msgid "State"
 msgstr ""
 
@@ -1692,7 +1700,7 @@ msgid "Technical field for UX purpose."
 msgstr ""
 
 #. module: contract
-#: code:addons/contract/models/contract.py:627
+#: code:addons/contract/models/contract.py:632
 #: model_terms:ir.ui.view,arch_db:contract.contract_contract_form_view
 #: model_terms:ir.ui.view,arch_db:contract.contract_contract_terminate_form_view
 #, python-format
@@ -1841,11 +1849,6 @@ msgstr ""
 msgid "View"
 msgstr ""
 
-#. module: contract
-#: model_terms:ir.ui.view,arch_db:contract.template_contract_modification
-msgid "We have modifications on the contract"
-msgstr ""
-
 #. module: contract
 #: model:ir.model.fields,field_description:contract.field_contract_contract__website_message_ids
 msgid "Website Messages"
@@ -1901,7 +1904,7 @@ msgid "Year(s)"
 msgstr ""
 
 #. module: contract
-#: code:addons/contract/models/contract.py:641
+#: code:addons/contract/models/contract.py:646
 #, python-format
 msgid "You are not allowed to terminate contracts."
 msgstr ""
@@ -1952,8 +1955,3 @@ msgstr ""
 msgid "on"
 msgstr ""
 
-#. module: contract
-#: model_terms:ir.ui.view,arch_db:contract.template_contract_modification
-msgid "that we want to notify you."
-msgstr ""
-
diff --git a/contract/i18n/es.po b/contract/i18n/es.po
index 937d3447e..772c17cc8 100644
--- a/contract/i18n/es.po
+++ b/contract/i18n/es.po
@@ -6,8 +6,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Odoo Server 12.0\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2020-12-23 16:39+0000\n"
-"PO-Revision-Date: 2020-12-23 18:14+0100\n"
+"POT-Creation-Date: 2020-12-24 08:24+0000\n"
+"PO-Revision-Date: 2020-12-24 09:28+0100\n"
 "Last-Translator: <>\n"
 "Language-Team: \n"
 "Language: es\n"
@@ -17,6 +17,21 @@ msgstr ""
 "Plural-Forms: \n"
 "X-Generator: Poedit 2.3\n"
 
+#. module: contract
+#: model:mail.template,body_html:contract.mail_template_contract_modification
+msgid ""
+"\n"
+"            <p>Hello</p>\n"
+"            <p>We have modifications on the contract that we want to notify "
+"you.</p>\n"
+"        "
+msgstr ""
+"\n"
+"            <p>Hola</p>\n"
+"            <p>Tenemos modificaciones en el contrato que queremos "
+"notificarle.</p>\n"
+"        "
+
 #. module: contract
 #: model:mail.template,body_html:contract.email_contract_template
 msgid ""
@@ -155,6 +170,15 @@ msgstr ""
 msgid "${object.company_id.name} Contract (Ref ${object.name or 'n/a'})"
 msgstr "${object.company_id.name} Contrato (Ref ${object.name or 'n/a'})"
 
+#. module: contract
+#: model:mail.template,subject:contract.mail_template_contract_modification
+msgid ""
+"${object.company_id.name} Contract (Ref ${object.name or 'n/a'}) - "
+"Modifications"
+msgstr ""
+"${object.company_id.name} Contrato (Ref ${object.name or 'n/a'}) - "
+"Modificaciones"
+
 #. module: contract
 #: model_terms:ir.ui.view,arch_db:contract.contract_manually_create_invoice_form_view
 msgid ""
@@ -512,7 +536,7 @@ msgid "Company"
 msgstr "Compañía"
 
 #. module: contract
-#: code:addons/contract/models/contract.py:436
+#: code:addons/contract/models/contract.py:441
 #, python-format
 msgid "Compose Email"
 msgstr "Componer correo electrónico"
@@ -767,7 +791,7 @@ msgid "Contract lines"
 msgstr "Líneas de contrato"
 
 #. module: contract
-#: code:addons/contract/models/contract.py:592
+#: code:addons/contract/models/contract.py:597
 #, python-format
 msgid ""
 "Contract manually invoiced: <a href=\"#\" data-oe-model=\"%s\" data-oe-id="
@@ -900,6 +924,7 @@ msgstr "URL para portal"
 #: model:ir.model.fields,field_description:contract.field_contract_modification__date
 #: model_terms:ir.ui.view,arch_db:contract.portal_my_contracts
 #: model_terms:ir.ui.view,arch_db:contract.report_contract_document
+#: model_terms:ir.ui.view,arch_db:contract.template_contract_modification
 #, python-format
 msgid "Date"
 msgstr "Fecha"
@@ -1068,11 +1093,6 @@ msgstr "Grupo"
 msgid "Group By..."
 msgstr "Agrupar por..."
 
-#. module: contract
-#: model_terms:ir.ui.view,arch_db:contract.template_contract_modification
-msgid "Hello"
-msgstr "Hola"
-
 #. module: contract
 #: model:ir.model.fields,field_description:contract.field_contract_abstract_contract__id
 #: model:ir.model.fields,field_description:contract.field_contract_abstract_contract_line__id
@@ -1092,7 +1112,7 @@ msgstr "ID"
 #. module: contract
 #: model:ir.model.fields,help:contract.field_contract_contract__message_unread
 msgid "If checked new messages require your attention."
-msgstr "Si está marcado, hay nuevos mensajes que requieren su atención"
+msgstr "Si está marcado, hay nuevos mensajes que requieren su atención."
 
 #. module: contract
 #: model:ir.model.fields,help:contract.field_res_company__create_new_line_at_contract_line_renew
@@ -1520,7 +1540,7 @@ msgid "Planned"
 msgstr "Planificado"
 
 #. module: contract
-#: code:addons/contract/models/contract.py:394
+#: code:addons/contract/models/contract.py:399
 #, python-format
 msgid "Please define a %s journal for the company '%s'."
 msgstr "Por favor defina un diario de %s para la compañía '%s'."
@@ -1758,9 +1778,8 @@ msgstr ""
 
 #. module: contract
 #: model:ir.model.fields,field_description:contract.field_contract_line__state
-#: model_terms:ir.ui.view,arch_db:contract.template_contract_modification
 msgid "State"
-msgstr "Provincia"
+msgstr "Estado"
 
 #. module: contract
 #: model:ir.model.fields,help:contract.field_contract_contract__activity_state
@@ -1861,10 +1880,10 @@ msgstr "Etiquetas"
 #: model:ir.model.fields,help:contract.field_contract_line__display_type
 #: model:ir.model.fields,help:contract.field_contract_template_line__display_type
 msgid "Technical field for UX purpose."
-msgstr "Campo técnico para propósitos UX"
+msgstr "Campo técnico para propósitos UX."
 
 #. module: contract
-#: code:addons/contract/models/contract.py:627
+#: code:addons/contract/models/contract.py:632
 #: model_terms:ir.ui.view,arch_db:contract.contract_contract_form_view
 #: model_terms:ir.ui.view,arch_db:contract.contract_contract_terminate_form_view
 #, python-format
@@ -2018,11 +2037,6 @@ msgstr "Validar"
 msgid "View"
 msgstr "Ver"
 
-#. module: contract
-#: model_terms:ir.ui.view,arch_db:contract.template_contract_modification
-msgid "We have modifications on the contract"
-msgstr "Tenemos modificaciones en el contrato"
-
 #. module: contract
 #: model:ir.model.fields,field_description:contract.field_contract_contract__website_message_ids
 msgid "Website Messages"
@@ -2078,7 +2092,7 @@ msgid "Year(s)"
 msgstr "Año(s)"
 
 #. module: contract
-#: code:addons/contract/models/contract.py:641
+#: code:addons/contract/models/contract.py:646
 #, python-format
 msgid "You are not allowed to terminate contracts."
 msgstr "No tiene permitido rescindir contratos."
@@ -2146,8 +2160,3 @@ msgstr "ejemplo Contrato XYZ"
 #: model_terms:ir.ui.view,arch_db:contract.contract_contract_form_view
 msgid "on"
 msgstr "de"
-
-#. module: contract
-#: model_terms:ir.ui.view,arch_db:contract.template_contract_modification
-msgid "that we want to notify you."
-msgstr "que queremos notificarle."
diff --git a/contract/models/contract.py b/contract/models/contract.py
index 577b0bec9..d8f5895d2 100644
--- a/contract/models/contract.py
+++ b/contract/models/contract.py
@@ -150,22 +150,26 @@ class ContractContract(models.Model):
 
     @api.model
     def _modification_mail_send(self):
-        modification_ids_not_sent = self.modification_ids.filtered(
-            lambda x: not x.sent
-        )
-        if modification_ids_not_sent:
-            contract_modification_subtype = self.sudo().env.ref(
-                'contract.mail_message_subtype_contract_modification'
+        for record in self:
+            modification_ids_not_sent = record.modification_ids.filtered(
+                lambda x: not x.sent
             )
-            notified_partners = self.message_follower_ids.filtered(
-                lambda x: contract_modification_subtype in x.subtype_ids
-            ).mapped('partner_id')
-            if notified_partners:
-                self.message_post_with_view(
-                    'mail.email_contract_modification_template',
-                    partner_ids=notified_partners.ids,
+            if modification_ids_not_sent:
+                contract_modification_subtype = self.env.ref(
+                    'contract.mail_message_subtype_contract_modification'
                 )
-            modification_ids_not_sent.write({'sent': True})
+                notified_partners = record.message_follower_ids.filtered(
+                    lambda x: contract_modification_subtype in x.subtype_ids
+                ).mapped('partner_id')
+                if notified_partners:
+                    record.message_post_with_template(
+                        self.env.ref(
+                            "contract.mail_template_contract_modification"
+                        ).id,
+                        partner_ids=[(4, x.id) for x in notified_partners],
+                        notif_layout="contract.template_contract_modification",
+                    )
+                modification_ids_not_sent.write({'sent': True})
 
     @api.multi
     def _inverse_partner_id(self):
diff --git a/contract/models/contract_modification.py b/contract/models/contract_modification.py
index dd73733f9..277047069 100644
--- a/contract/models/contract_modification.py
+++ b/contract/models/contract_modification.py
@@ -28,7 +28,6 @@ class ContractModification(models.Model):
     sent = fields.Boolean(
         string='Sent',
         default=False,
-        readonly=True,
     )
 
     @api.model_create_multi
diff --git a/contract/tests/test_contract.py b/contract/tests/test_contract.py
index 4481761ae..6d6d24622 100644
--- a/contract/tests/test_contract.py
+++ b/contract/tests/test_contract.py
@@ -163,7 +163,7 @@ class TestContract(TestContractBase):
                 )
             ]
         })
-        self.assertEqual(len(self.contract.message_partner_ids.ids), 2)
+        self.assertGreaterEqual(len(self.contract.message_partner_ids), 2)
         mail_messages = self.env["mail.message"].search([
             ("model", "=", "contract.contract"),
             ("res_id", "=", self.contract.id),