diff --git a/cotisations/forms.py b/cotisations/forms.py
index 5d432849..19ab2fe7 100644
--- a/cotisations/forms.py
+++ b/cotisations/forms.py
@@ -284,7 +284,7 @@ class RechargeForm(FormRevMixin, Form):
             _("Select a payment method")
         self.fields['payment'].queryset = Paiement.find_allowed_payments(user)
 
-    def clean_value(self):
+    def clean(self):
         """
         Returns a cleaned value from the received form by validating
         the value is well inside the possible limits
@@ -292,18 +292,12 @@ class RechargeForm(FormRevMixin, Form):
         value = self.cleaned_data['value']
         balance_method, _created = balance.PaymentMethod\
             .objects.get_or_create()
-        if value < balance_method.minimum_balance:
-            raise forms.ValidationError(
-                _("Requested amount is too small. Minimum amount possible : \
-                %(min_online_amount)s €.") % {
-                    'min_online_amount': balance_method.minimum_balance
-                }
-            )
-        if value + self.user.solde > balance_method.maximum_balance:
+        if balance_method.maximum_balance is not None and \
+           value + self.user.solde > balance_method.maximum_balance:
             raise forms.ValidationError(
                 _("Requested amount is too high. Your balance can't exceed \
                 %(max_online_balance)s €.") % {
                     'max_online_balance': balance_method.maximum_balance
                 }
             )
-        return value
+        return self.cleaned_data
diff --git a/cotisations/migrations/0030_custom_payment.py b/cotisations/migrations/0030_custom_payment.py
index 1f54fc1d..bdd7cde9 100644
--- a/cotisations/migrations/0030_custom_payment.py
+++ b/cotisations/migrations/0030_custom_payment.py
@@ -112,7 +112,7 @@ class Migration(migrations.Migration):
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('minimum_balance', models.DecimalField(decimal_places=2, default=0, help_text='The minimal amount of money allowed for the balance at the end of a payment. You can specify negative amount.', max_digits=5, verbose_name='Minimum balance')),
                 ('payment', models.OneToOneField(editable=False, on_delete=django.db.models.deletion.CASCADE, related_name='payment_method', to='cotisations.Paiement')),
-                ('maximum_balance', models.DecimalField(decimal_places=2, default=50, help_text='The maximal amount of money allowed for the balance.', max_digits=5, verbose_name='Maximum balance')),
+                ('maximum_balance', models.DecimalField(decimal_places=2, default=50, help_text='The maximal amount of money allowed for the balance.', max_digits=5, verbose_name='Maximum balance', null=True, blank=True)),
             ],
             bases=(cotisations.payment_methods.mixins.PaymentMethodMixin, models.Model),
         ),
diff --git a/cotisations/payment_methods/balance/models.py b/cotisations/payment_methods/balance/models.py
index 4d2875d8..958906fa 100644
--- a/cotisations/payment_methods/balance/models.py
+++ b/cotisations/payment_methods/balance/models.py
@@ -55,7 +55,9 @@ class BalancePayment(PaymentMethodMixin, models.Model):
         help_text=_l("The maximal amount of money allowed for the balance."),
         max_digits=5,
         decimal_places=2,
-        default=50
+        default=50,
+        blank=True,
+        null=True,
     )
 
     def end_payment(self, invoice, request):
diff --git a/cotisations/templates/cotisations/facture.html b/cotisations/templates/cotisations/facture.html
index 7e4d6db0..01933277 100644
--- a/cotisations/templates/cotisations/facture.html
+++ b/cotisations/templates/cotisations/facture.html
@@ -39,6 +39,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 {% else %}
 <h3>{% trans "New invoice" %}</h3>
 {% endif %}
+{% if max_balance %}
+<h4>{% trans "Maximum allowed balance : "%}{{max_balance}} €</h4>
+{% endif %}
 {% if balance is not None %}
 <p>
     {% trans "Current balance :" %} {{ balance }} €
diff --git a/cotisations/views.py b/cotisations/views.py
index 40e10e36..f561147b 100644
--- a/cotisations/views.py
+++ b/cotisations/views.py
@@ -32,7 +32,7 @@ from __future__ import unicode_literals
 import os
 
 from django.urls import reverse
-from django.shortcuts import render, redirect
+from django.shortcuts import render, redirect, get_object_or_404
 from django.contrib.auth.decorators import login_required
 from django.contrib import messages
 from django.db.models import ProtectedError
@@ -696,9 +696,11 @@ def credit_solde(request, user, **_kwargs):
             number=1
         )
         return invoice.paiement.end_payment(invoice, request)
+    p = get_object_or_404(Paiement, is_balance=True)
     return form({
         'factureform': refill_form,
         'balance': request.user.solde,
         'title': _("Refill your balance"),
-        'action_name': _("Pay")
+        'action_name': _("Pay"),
+        'max_balance': p.payment_method.maximum_balance,
     }, 'cotisations/facture.html', request)