diff --git a/la_chariotte/order/forms.py b/la_chariotte/order/forms.py
index 8e28d5a..334339c 100644
--- a/la_chariotte/order/forms.py
+++ b/la_chariotte/order/forms.py
@@ -4,6 +4,7 @@ from django import forms
 from django.contrib.auth import get_user_model
 from django.forms.utils import to_current_timezone
 from django.utils import timezone
+from pygments.lexer import default
 
 from la_chariotte.order.models import GroupedOrder, Item
 
@@ -18,6 +19,10 @@ class GroupedOrderForm(forms.ModelForm):
         widget=forms.TimeInput(attrs={"type": "time"}),
         initial=datetime.time(hour=23, minute=59, second=59),
     )
+    phone_mandatory = forms.BooleanField(
+        label="Numéro de téléphone obligatoire pour les participants",
+        required=False,
+    )
 
     class Meta:
         model = GroupedOrder
@@ -29,6 +34,7 @@ class GroupedOrderForm(forms.ModelForm):
             "delivery_slot",
             "place",
             "description",
+            "phone_mandatory"
         ]
         widgets = {
             "name": forms.TextInput(
diff --git a/la_chariotte/order/migrations/0027_groupedorder_phone_mandatory.py b/la_chariotte/order/migrations/0027_groupedorder_phone_mandatory.py
new file mode 100644
index 0000000..273749b
--- /dev/null
+++ b/la_chariotte/order/migrations/0027_groupedorder_phone_mandatory.py
@@ -0,0 +1,20 @@
+# Generated by Django 4.2.11 on 2024-04-14 08:58
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("order", "0026_groupedorder_delivery_slot"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="groupedorder",
+            name="phone_mandatory",
+            field=models.BooleanField(
+                default=False, verbose_name="Numéro de téléphone obligatoire"
+            ),
+        ),
+    ]
diff --git a/la_chariotte/order/models.py b/la_chariotte/order/models.py
index 55dd867..84d601f 100644
--- a/la_chariotte/order/models.py
+++ b/la_chariotte/order/models.py
@@ -27,6 +27,7 @@ class GroupedOrder(models.Model):
     description = models.TextField("Description", null=True, blank=True)
     total_price = models.DecimalField(max_digits=10, decimal_places=2, default=0)
     code = models.CharField(auto_created=True)
+    phone_mandatory = models.BooleanField(default=False, verbose_name="Numéro de téléphone obligatoire")
 
     def create_code_from_pk(self):
         """When a grouped order is created, a unique code is generated, to be used to
diff --git a/la_chariotte/order/templates/order/grouped_order_create.html b/la_chariotte/order/templates/order/grouped_order_create.html
index 3accfb1..01c8858 100644
--- a/la_chariotte/order/templates/order/grouped_order_create.html
+++ b/la_chariotte/order/templates/order/grouped_order_create.html
@@ -1,5 +1,7 @@
 {% extends 'base.html' %}
 
+{% load crispy_forms_tags %}
+
 {% block title %}Nouvelle commande groupée{% endblock %}
 
 {% block content %}
@@ -10,8 +12,9 @@
         <p class="title">Nouvelle commande groupée</p>
         <div class="columns">
             <div class="column is-8">
-                <form method="post" onsubmit="deadlinePassedCheck(event)">{% csrf_token %}
-                    {{ form.as_p }}
+                <form method="post" onsubmit="deadlinePassedCheck(event)">
+                    {% csrf_token %}
+                    {{ form | crispy }}
                     <div class="buttons">
                         <a class="button is-light" href="{% url 'order:index' %}">Annuler</a>
                         <input class="button is-primary" type="submit" value="Suivant">
diff --git a/la_chariotte/order/templates/order/grouped_order_detail.html b/la_chariotte/order/templates/order/grouped_order_detail.html
index b80aed5..b8472dd 100644
--- a/la_chariotte/order/templates/order/grouped_order_detail.html
+++ b/la_chariotte/order/templates/order/grouped_order_detail.html
@@ -186,7 +186,6 @@
         // Compute total price whenever a value in input is modified
         document.getElementById("inputs-parent").addEventListener("change", function () {
             inputs = [...document.getElementsByTagName("input")].filter(input => input.getAttribute("name").indexOf("quantity_") === 0);  //filter the inputs to get the quantity inputs only
-
             prices = {{ prices_dict | safe }};
             let total_price = 0;
 
@@ -200,5 +199,11 @@
                 el.innerHTML = total_price;
             })
         });
+
+
+        if( '{{ phone_required }}' === 'True') {
+            document.getElementById('phone').required = true
+        }
+
     {% endblock %}
 </script>
diff --git a/la_chariotte/order/templates/order/grouped_order_update.html b/la_chariotte/order/templates/order/grouped_order_update.html
index e6ad3b4..d8d0695 100644
--- a/la_chariotte/order/templates/order/grouped_order_update.html
+++ b/la_chariotte/order/templates/order/grouped_order_update.html
@@ -1,5 +1,7 @@
 {% extends 'base.html' %}
 
+{% load crispy_forms_tags %}
+
 {% block title %}Modifier la commande groupée{% endblock %}
 
 {% block content %}
@@ -9,13 +11,19 @@
 <div class="box">
     <p class="title">{{ grouped_order.name }} - modifier</p>
     <form method="post" onsubmit="deadlinePassedCheck(event)">{% csrf_token %}
-        {{ form.as_p }}
+        {{ form | crispy }}
         <div class="buttons">
             <a class="button is-light" href="{% url 'order:index' %}">Annuler</a>
             <input class="button is-primary" type="submit" value="Suivant">
         </div>
     </form>
 </div>
+
+    <button type="button" class="collapsible">Open Collapsible</button>
+    <div class="content">
+        <p>Lorem ipsum...</p>
+    </div>
+
 {% endblock %}
 
 {% block extra_js %}
diff --git a/la_chariotte/order/views/grouped_order.py b/la_chariotte/order/views/grouped_order.py
index f2c454b..ff77335 100644
--- a/la_chariotte/order/views/grouped_order.py
+++ b/la_chariotte/order/views/grouped_order.py
@@ -30,8 +30,8 @@ class IndexView(LoginRequiredMixin, generic.ListView):
 
         # Get the 5 most recent old grouped orders
         old = grouped_orders.filter(delivery_date__lt=today).order_by("-delivery_date")[
-            :5
-        ]
+              :5
+              ]
 
         # Get grouped orders that have crossed their ordering deadline
         # but the delivery date is still to come.
@@ -82,7 +82,7 @@ class GroupedOrderEventView(generic.DetailView):
             description += "Heure de livraison : " + self.object.delivery_slot + "\n"
         if self.object.description:
             description += (
-                "Note de l'organisateur.ice : " + "\n" + self.object.description
+                    "Note de l'organisateur.ice : " + "\n" + self.object.description
             )
         event.add("description", vText(description))
 
@@ -112,7 +112,8 @@ class GroupedOrderDetailView(generic.DetailView):
         return get_object_or_404(GroupedOrder, code=self.kwargs.get("code"))
 
     def get_context_data(self, **kwargs):
-        items = self.get_object().item_set.all()
+        grouped_order = self.get_object()
+        items = grouped_order.item_set.all()
 
         remaining_qty = {item.id: item.get_remaining_nb() for item in items}
         prices_dict = {item.id: item.price for item in items}
@@ -134,6 +135,8 @@ class GroupedOrderDetailView(generic.DetailView):
                 "prices_dict": json.dumps(prices_dict, cls=DjangoJSONEncoder),
                 "remaining_qty": remaining_qty,
                 "order_author": order_author,
+                # Used to set if the phone is required in the form
+                "phone_required": grouped_order.phone_mandatory,
             }
         )
         return context
@@ -362,7 +365,7 @@ class ExportGroupedOrderToCSVView(GroupedOrderExportView):
         response = http.HttpResponse(
             content_type="text/csv",
             headers={
-                "Content-Disposition": f'attachment; filename="{ context["object"].name }-commandes"'
+                "Content-Disposition": f'attachment; filename="{context["object"].name}-commandes"'
             },
         )
         writer = csv.writer(response)