diff --git a/CHANGELOG b/CHANGELOG
index c9f7c5f403..7c8f7e5595 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+* Rename Payment Group reference into number
+* Add payment group sequence in configuration
 * Add Python3 support
 
 Version 3.8.0 - 2015-11-02
diff --git a/__init__.py b/__init__.py
index 8b07f5fec3..d7fb65f94a 100644
--- a/__init__.py
+++ b/__init__.py
@@ -13,6 +13,7 @@ def register():
         MoveLine,
         ProcessPaymentStart,
         PayLineStart,
+        Configuration,
         module='account_payment', type_='model')
     Pool.register(
         ProcessPayment,
diff --git a/account.py b/account.py
index ac28f2b0a3..d30c445c36 100644
--- a/account.py
+++ b/account.py
@@ -13,7 +13,7 @@ from trytond.transaction import Transaction
 
 from .payment import KINDS
 
-__all__ = ['MoveLine', 'PayLine', 'PayLineStart']
+__all__ = ['MoveLine', 'PayLine', 'PayLineStart', 'Configuration']
 
 
 class MoveLine:
@@ -178,3 +178,14 @@ class PayLine(Wizard):
         return action, {
             'res_id': [p.id for p in payments],
             }
+
+
+class Configuration:
+    __metaclass__ = PoolMeta
+    __name__ = 'account.configuration'
+    payment_group_sequence = fields.Property(fields.Many2One('ir.sequence',
+            'Payment Group Sequence', domain=[
+                ('company', 'in',
+                    [Eval('context', {}).get('company', -1), None]),
+                ('code', '=', 'account.payment.group'),
+                ], required=True))
diff --git a/account.xml b/account.xml
index ec21cc489c..a1e68092f3 100644
--- a/account.xml
+++ b/account.xml
@@ -75,5 +75,16 @@ this repository contains the full copyright notices and license terms. -->
             <field name="group" ref="group_payment"/>
         </record>
 
+        <record model="ir.property" id="property_payment_group_sequence">
+            <field name="field"
+                search="[('model.model', '=', 'account.configuration'), ('name', '=', 'payment_group_sequence')]"/>
+            <field name="value" eval="'ir.sequence,' + str(ref('sequence_account_payment_group'))"/>
+        </record>
+
+        <record model="ir.ui.view" id="configuration_view_form">
+            <field name="model">account.configuration</field>
+            <field name="inherit" ref="account.configuration_view_form"/>
+            <field name="name">configuration_form</field>
+        </record>
     </data>
 </tryton>
diff --git a/payment.py b/payment.py
index 3fa6fe88c2..674529f5dc 100644
--- a/payment.py
+++ b/payment.py
@@ -7,6 +7,7 @@ from trytond.pyson import Eval, If
 from trytond.transaction import Transaction
 from trytond.wizard import Wizard, StateView, StateAction, Button
 from trytond.pool import Pool
+from trytond import backend
 
 __all__ = ['Journal', 'Group', 'Payment',
     'ProcessPaymentStart', 'ProcessPayment']
@@ -43,8 +44,8 @@ class Journal(ModelSQL, ModelView):
 class Group(ModelSQL, ModelView):
     'Payment Group'
     __name__ = 'account.payment.group'
-    _rec_name = 'reference'
-    reference = fields.Char('Reference', required=True, readonly=True)
+    _rec_name = 'number'
+    number = fields.Char('Number', required=True, readonly=True)
     company = fields.Many2One('company.company', 'Company', required=True,
         readonly=True, select=True, domain=[
             ('id', If(Eval('context', {}).contains('company'), '=', '!='),
@@ -59,6 +60,16 @@ class Group(ModelSQL, ModelView):
     payments = fields.One2Many('account.payment', 'group', 'Payments',
         readonly=True)
 
+    @classmethod
+    def __register__(cls, module_name):
+        TableHandler = backend.get('TableHandler')
+        table_h = TableHandler(cls, module_name)
+
+        # Migration from 3.8: rename reference into number
+        if table_h.column_exist('reference'):
+            table_h.column_rename('reference', 'number')
+        super(Group, cls).__register__(module_name)
+
     @staticmethod
     def default_company():
         return Transaction().context.get('company')
@@ -67,11 +78,14 @@ class Group(ModelSQL, ModelView):
     def create(cls, vlist):
         pool = Pool()
         Sequence = pool.get('ir.sequence')
+        Config = pool.get('account.configuration')
 
         vlist = [v.copy() for v in vlist]
+        config = Config(1)
         for values in vlist:
-            if 'reference' not in values:
-                values['reference'] = Sequence.get('account.payment.group')
+            if values.get('number') is None:
+                values['number'] = Sequence.get_id(
+                    config.payment_group_sequence.id)
 
         return super(Group, cls).create(vlist)
 
diff --git a/view/configuration_form.xml b/view/configuration_form.xml
new file mode 100644
index 0000000000..69d861f06c
--- /dev/null
+++ b/view/configuration_form.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<data>
+    <xpath expr="/form" position="inside">
+        <separator id="payment" string="Payment" colspan="4"/>
+        <label name="payment_group_sequence" string="Group Sequence"/>
+        <field name="payment_group_sequence"/>
+        <newline/>
+    </xpath>
+</data>
diff --git a/view/payment_group_form.xml b/view/payment_group_form.xml
index 89c710738b..daa38244e6 100644
--- a/view/payment_group_form.xml
+++ b/view/payment_group_form.xml
@@ -2,8 +2,8 @@
 <!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
 this repository contains the full copyright notices and license terms. -->
 <form string="Payment Group">
-    <label name="reference"/>
-    <field name="reference"/>
+    <label name="number"/>
+    <field name="number"/>
     <label name="company"/>
     <field name="company"/>
     <label name="journal"/>
diff --git a/view/payment_group_list.xml b/view/payment_group_list.xml
index 35ec41b708..a0c668cc16 100644
--- a/view/payment_group_list.xml
+++ b/view/payment_group_list.xml
@@ -2,7 +2,7 @@
 <!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
 this repository contains the full copyright notices and license terms. -->
 <tree string="Payment Groups" keyword_open="1">
-    <field name="reference"/>
+    <field name="number"/>
     <field name="journal"/>
     <field name="kind"/>
 </tree>