Add a custom text field for every attendee in the question step

src/pretix/api/serializers/event.py

@@ -597,6 +597,7 @@ class EventSettingsSerializer(serializers.Serializer):
         'attendee_addresses_required',
         'attendee_company_asked',
         'attendee_company_required',
+        'attendee_data_explanation_text',
         'confirm_texts',
         'order_email_asked_twice',
         'payment_term_mode',

src/pretix/base/settings.py

@@ -1832,6 +1832,19 @@ Your {event} team"""))
                         "how to obtain a voucher code.")
         )
     },
+    'attendee_data_explanation_text': {
+        'default': '',
+        'type': LazyI18nString,
+        'serializer_class': I18nField,
+        'form_class': I18nFormField,
+        'form_kwargs': dict(
+            label=_("Attendee data explanation"),
+            widget=I18nTextarea,
+            widget_kwargs={'attrs': {'rows': '2'}},
+            help_text=_("This text will be shown above the questions asked for every admission product. You can use it e.g. to explain "
+                        "why you need information from them.")
+        )
+    },
     'checkout_email_helptext': {
         'default': LazyI18nString.from_gettext(gettext_noop(
             'Make sure to enter a valid email address. We will send you an order '

src/pretix/control/forms/event.py

@@ -479,6 +479,7 @@ class EventSettingsForm(SettingsForm):
         'attendee_company_required',
         'attendee_addresses_asked',
         'attendee_addresses_required',
+        'attendee_data_explanation_text',
         'banner_text',
         'banner_text_bottom',
         'order_email_asked_twice',

src/pretix/control/templates/pretixcontrol/event/settings.html

@@ -98,6 +98,7 @@
                 {% bootstrap_field sform.attendee_addresses_asked layout="control" %}
                 {% bootstrap_field sform.attendee_addresses_required layout="control" %}
                 {% bootstrap_field sform.checkout_show_copy_answers_button layout="control" %}
+                {% bootstrap_field sform.attendee_data_explanation_text layout="control" %}
             </fieldset>
             <fieldset>
                 <legend>{% trans "Texts" %}</legend>

src/pretix/presale/templates/pretixpresale/event/checkout_questions.html

@@ -75,6 +75,9 @@
                     </summary>
                     <div>
                         <div class="panel-body questions-form">
+                            {% if event.settings.attendee_data_explanation_text and pos.item.admission %}
+                                {{ event.settings.attendee_data_explanation_text|rich_text }}
+                            {% endif %}
                             {% if pos.seat %}
                                 <div class="form-group">
                                     <label class="col-md-3 control-label">