diff --git a/lingo/invoicing/forms.py b/lingo/invoicing/forms.py
index b2f385a..8795b92 100644
--- a/lingo/invoicing/forms.py
+++ b/lingo/invoicing/forms.py
@@ -19,7 +19,7 @@ import django_filters
 from django import forms
 from django.utils.translation import ugettext_lazy as _
 
-from lingo.invoicing.models import Campaign, DraftInvoiceLine, InvoiceLine, Regie
+from lingo.invoicing.models import Campaign, DraftInvoice, DraftInvoiceLine, Invoice, InvoiceLine, Regie
 
 
 class CampaignForm(forms.ModelForm):
@@ -51,17 +51,74 @@ def regie_queryset(request):
     return Regie.objects.all()
 
 
+class AbstractInvoiceFilterSet(django_filters.FilterSet):
+    regie = django_filters.ModelChoiceFilter(
+        label=_('Regie'),
+        queryset=regie_queryset,
+    )
+    # for Invoice
+    number = django_filters.CharFilter(
+        label=_('Invoice number'),
+        field_name='formatted_number',
+        lookup_expr='contains',
+    )
+    # for DraftInvoice
+    pk = django_filters.NumberFilter(
+        label=_('Invoice number'),
+    )
+    payer_external_id = django_filters.CharFilter(
+        label=_('Payer (external ID)'),
+        field_name='payer',
+    )
+    user_external_id = django_filters.CharFilter(
+        label=_('User (external ID)'),
+        method='filter_user_external_id',
+    )
+
+    def __init__(self, *args, **kwargs):
+        self.pool = kwargs.pop('pool')
+        super().__init__(*args, **kwargs)
+
+        if self.pool.draft:
+            del self.filters['number']
+        else:
+            del self.filters['pk']
+
+    def filter_user_external_id(self, queryset, name, value):
+        if not value:
+            return queryset
+        line_model = InvoiceLine
+        if self.pool.draft:
+            line_model = DraftInvoiceLine
+        lines = line_model.objects.filter(user_external_id=value).values('invoice')
+        return queryset.filter(pk__in=lines)
+
+
+class DraftInvoiceFilterSet(AbstractInvoiceFilterSet):
+    class Meta:
+        model = DraftInvoice
+        fields = []
+
+
+class InvoiceFilterSet(AbstractInvoiceFilterSet):
+    class Meta:
+        model = Invoice
+        fields = []
+
+
 class AbstractLineFilterSet(django_filters.FilterSet):
     regie = django_filters.ModelChoiceFilter(
         label=_('Regie'),
         queryset=regie_queryset,
         field_name='invoice__regie',
     )
+    # for InvoiceLine
     invoice_number = django_filters.CharFilter(
         label=_('Invoice number'),
         field_name='invoice__formatted_number',
         lookup_expr='contains',
     )
+    # for DraftInvoiceLine
     invoice_id = django_filters.NumberFilter(
         label=_('Invoice number'),
     )
diff --git a/lingo/invoicing/templates/lingo/invoicing/manager_invoice_lines.html b/lingo/invoicing/templates/lingo/invoicing/manager_invoice_lines.html
index 14550cd..29f8ad6 100644
--- a/lingo/invoicing/templates/lingo/invoicing/manager_invoice_lines.html
+++ b/lingo/invoicing/templates/lingo/invoicing/manager_invoice_lines.html
@@ -1,7 +1,8 @@
+{% url 'lingo-manager-invoicing-pool-journal' pk=object.pk pool_pk=pool.pk as journal_url %}
 {% for line in object_list %}
   <li class="line" data-invoice-id="{{ line.invoice_id }}">
     <a href="{{ journal_url }}?pk={{ line.pk }}">#{{ line.pk }}</a>
-    <a href="{{ journal_url }}?user_external_id={{ line.user_external_id }}">{{ line.user_name }}</a>
+    <a href="{{ journal_url }}?user_external_id={{ line.user_external_id }}">{{ line.user_name }} ({{ line.user_external_id }})</a>
     - {{ line.event_date|date:"d/m/Y" }} - {{ line.label }} ({{ line.total_amount }})
   </li>
 {% endfor %}
diff --git a/lingo/invoicing/templates/lingo/invoicing/manager_pool_detail.html b/lingo/invoicing/templates/lingo/invoicing/manager_pool_detail.html
index 5a2b743..e0af55e 100644
--- a/lingo/invoicing/templates/lingo/invoicing/manager_pool_detail.html
+++ b/lingo/invoicing/templates/lingo/invoicing/manager_pool_detail.html
@@ -25,7 +25,27 @@
 {% endblock %}
 
 {% block content %}
-  {% url 'lingo-manager-invoicing-pool-journal' pk=object.pk pool_pk=pool.pk  as journal_url %}
+  <div class="section">
+    <div>
+      <form class="invoice-filters">
+        <fieldset class="gadjo-foldable gadjo-folded" id="filters">
+          <legend class="gadjo-foldable-widget">{% trans "Invoice Filtering" %}</legend>
+          <div class="gadjo-folding">
+            {{ filterset.form.as_p }}
+          </div>
+        </fieldset>
+        <script>
+          $(function() {
+            $('form.invoice-filters input,select').on('change',
+              function() {
+                $(this).parents('form').submit();
+              });
+          });
+        </script>
+      </form>
+    </div>
+  </div>
+  {% url 'lingo-manager-invoicing-pool-journal' pk=object.pk pool_pk=pool.pk as journal_url %}
   <div>
     <ul class="objects-list">
       {% for invoice in object_list %}
diff --git a/lingo/invoicing/views.py b/lingo/invoicing/views.py
index 8fb8631..c5d963c 100644
--- a/lingo/invoicing/views.py
+++ b/lingo/invoicing/views.py
@@ -39,7 +39,13 @@ from django.views.generic import (
 )
 
 from lingo.agendas.models import Agenda
-from lingo.invoicing.forms import CampaignForm, DraftInvoiceLineFilterSet, InvoiceLineFilterSet
+from lingo.invoicing.forms import (
+    CampaignForm,
+    DraftInvoiceFilterSet,
+    DraftInvoiceLineFilterSet,
+    InvoiceFilterSet,
+    InvoiceLineFilterSet,
+)
 from lingo.invoicing.models import (
     Campaign,
     DraftInvoice,
@@ -313,13 +319,21 @@ class PoolDetailView(ListView):
 
     def get_queryset(self):
         invoice_model = Invoice
+        filter_model = InvoiceFilterSet
         if self.object.draft:
             invoice_model = DraftInvoice
-        return invoice_model.objects.filter(pool=self.object)
+            filter_model = DraftInvoiceFilterSet
+
+        data = self.request.GET or None
+        self.filterset = filter_model(
+            data=data, queryset=invoice_model.objects.filter(pool=self.object), pool=self.object
+        )
+        return self.filterset.qs
 
     def get_context_data(self, **kwargs):
         kwargs['object'] = self.campaign
         kwargs['pool'] = self.object
+        kwargs['filterset'] = self.filterset
         line_model = InvoiceLine
         line_values = ['status', 'error_status']
         if self.object.draft:
@@ -461,16 +475,21 @@ class InvoiceLineListView(ListView):
     template_name = 'lingo/invoicing/manager_invoice_lines.html'
 
     def dispatch(self, request, *args, **kwargs):
-        pool = get_object_or_404(Pool, pk=kwargs['pool_pk'], campaign_id=kwargs['pk'])
+        self.pool = get_object_or_404(Pool, pk=kwargs['pool_pk'], campaign_id=kwargs['pk'])
         invoice_model = Invoice
-        if pool.draft:
+        if self.pool.draft:
             invoice_model = DraftInvoice
-        self.invoice = get_object_or_404(invoice_model, pk=kwargs['invoice_pk'], pool=pool)
+        self.invoice = get_object_or_404(invoice_model, pk=kwargs['invoice_pk'], pool=self.pool)
         return super().dispatch(request, *args, **kwargs)
 
     def get_queryset(self):
         return self.invoice.lines.all().order_by('user_external_id', 'event_date', 'pk')
 
+    def get_context_data(self, **kwargs):
+        kwargs['object'] = self.pool.campaign
+        kwargs['pool'] = self.pool
+        return super().get_context_data(**kwargs)
+
 
 invoice_line_list = InvoiceLineListView.as_view()
 
diff --git a/tests/invoicing/manager/test_campaign.py b/tests/invoicing/manager/test_campaign.py
index ff3ca53..99864c7 100644
--- a/tests/invoicing/manager/test_campaign.py
+++ b/tests/invoicing/manager/test_campaign.py
@@ -540,12 +540,13 @@ def test_detail_pool_invoices(app, admin_user, draft):
         draft=draft,
         status='completed',
     )
-    regie = Regie.objects.create(label='Foo')
+    regie1 = Regie.objects.create(label='Foo1')
+    regie2 = Regie.objects.create(label='Foo1')
     invoice1 = invoice_model.objects.create(
-        date_issue=datetime.date.today(), regie=regie, pool=pool, payer='payer:1'
+        date_issue=datetime.date.today(), regie=regie1, pool=pool, payer='payer:1'
     )
     invoice2 = invoice_model.objects.create(
-        date_issue=datetime.date.today(), regie=regie, pool=pool, payer='payer:2'
+        date_issue=datetime.date.today(), regie=regie2, pool=pool, payer='payer:2'
     )
     if not draft:
         invoice1.set_number()
@@ -627,7 +628,7 @@ def test_detail_pool_invoices(app, admin_user, draft):
         assert resp.pyquery(
             'li[data-invoice-id="%s"]' % invoice1.pk
         ).text() == 'Invoice F%02s-%s-0000001 addressed to payer:1, amount 6.00€' % (
-            regie.pk,
+            regie1.pk,
             invoice1.created_at.strftime('%y-%m'),
         )
     lines_url = resp.pyquery('li[data-invoice-id="%s"]' % invoice1.pk).attr('data-invoice-lines-url')
@@ -640,15 +641,15 @@ def test_detail_pool_invoices(app, admin_user, draft):
     assert len(lines_resp.pyquery('li')) == 3
     assert (
         lines_resp.pyquery('li:nth-child(1)').text()
-        == '#%s User1 Name1 - 01/09/2022 - Label 11 (1.00)' % line11.pk
+        == '#%s User1 Name1 (user:1) - 01/09/2022 - Label 11 (1.00)' % line11.pk
     )
     assert (
         lines_resp.pyquery('li:nth-child(2)').text()
-        == '#%s User1 Name1 - 03/09/2022 - Label 13 (3.00)' % line13.pk
+        == '#%s User1 Name1 (user:1) - 03/09/2022 - Label 13 (3.00)' % line13.pk
     )
     assert (
         lines_resp.pyquery('li:nth-child(3)').text()
-        == '#%s User2 Name2 - 02/09/2022 - Label 12 (2.00)' % line12.pk
+        == '#%s User2 Name2 (user:2) - 02/09/2022 - Label 12 (2.00)' % line12.pk
     )
     if draft:
         assert (
@@ -658,8 +659,8 @@ def test_detail_pool_invoices(app, admin_user, draft):
     else:
         assert resp.pyquery(
             'li[data-invoice-id="%s"]' % invoice2.pk
-        ).text() == 'Invoice F%02d-%s-0000002 addressed to payer:2, amount 1.00€' % (
-            regie.pk,
+        ).text() == 'Invoice F%02d-%s-0000001 addressed to payer:2, amount 1.00€' % (
+            regie2.pk,
             invoice2.created_at.strftime('%y-%m'),
         )
     lines_url = resp.pyquery('li[data-invoice-id="%s"]' % invoice2.pk).attr('data-invoice-lines-url')
@@ -672,9 +673,53 @@ def test_detail_pool_invoices(app, admin_user, draft):
     assert len(lines_resp.pyquery('li')) == 1
     assert (
         lines_resp.pyquery('li:nth-child(1)').text()
-        == '#%s User1 Name1 - 01/09/2022 - Label 21 (1.00)' % line21.pk
+        == '#%s User1 Name1 (user:1) - 01/09/2022 - Label 21 (1.00)' % line21.pk
     )
 
+    # test filters
+    resp = app.get(
+        '/manage/invoicing/campaign/%s/pool/%s/' % (campaign.pk, pool.pk),
+        params={'regie': regie1.pk},
+    )
+    assert len(resp.pyquery('li.invoice')) == 1
+    if draft:
+        resp = app.get(
+            '/manage/invoicing/campaign/%s/pool/%s/' % (campaign.pk, pool.pk),
+            params={'pk': invoice1.pk},
+        )
+        assert len(resp.pyquery('li.invoice')) == 1
+    else:
+        resp = app.get(
+            '/manage/invoicing/campaign/%s/pool/%s/' % (campaign.pk, pool.pk),
+            params={'number': invoice1.formatted_number},
+        )
+        assert len(resp.pyquery('li.invoice')) == 1
+        resp = app.get(
+            '/manage/invoicing/campaign/%s/pool/%s/' % (campaign.pk, pool.pk),
+            params={'number': invoice1.created_at.strftime('%y-%m')},
+        )
+        assert len(resp.pyquery('li.invoice')) == 2
+    resp = app.get(
+        '/manage/invoicing/campaign/%s/pool/%s/' % (campaign.pk, pool.pk),
+        params={'payer_external_id': 'payer:1'},
+    )
+    assert len(resp.pyquery('li.invoice')) == 1
+    resp = app.get(
+        '/manage/invoicing/campaign/%s/pool/%s/' % (campaign.pk, pool.pk),
+        params={'payer_external_id': 'payer:2'},
+    )
+    assert len(resp.pyquery('li.invoice')) == 1
+    resp = app.get(
+        '/manage/invoicing/campaign/%s/pool/%s/' % (campaign.pk, pool.pk),
+        params={'user_external_id': 'user:1'},
+    )
+    assert len(resp.pyquery('li.invoice')) == 2
+    resp = app.get(
+        '/manage/invoicing/campaign/%s/pool/%s/' % (campaign.pk, pool.pk),
+        params={'user_external_id': 'user:2'},
+    )
+    assert len(resp.pyquery('li.invoice')) == 1
+
 
 def test_journal_pool(app, admin_user):
     campaign = Campaign.objects.create(