diff --git a/aleksis/apps/tezor/models/invoice.py b/aleksis/apps/tezor/models/invoice.py
index b7c1eb5418bde62776942ccd74b0564a86b82601..8cc80a04d14c7f020298770d11483580a94291cb 100644
--- a/aleksis/apps/tezor/models/invoice.py
+++ b/aleksis/apps/tezor/models/invoice.py
@@ -56,7 +56,7 @@ class Invoice(BasePayment, PureDjangoModel):
 
     class Meta:
         constraints = [
-            models.UniqueConstraint(fields=["transaction_id", "group"], name="number_uniq_per_group")
+            models.UniqueConstraint(fields=["number", "group"], name="number_uniq_per_group")
         ]
 
     @property
diff --git a/aleksis/apps/tezor/tables.py b/aleksis/apps/tezor/tables.py
index 1139c5eae99adb5ea61b632c504b703836646789..47660380cc7330a34e46d946c9fce975fe4e1a59 100644
--- a/aleksis/apps/tezor/tables.py
+++ b/aleksis/apps/tezor/tables.py
@@ -85,7 +85,7 @@ class InvoiceGroupsTable(tables.Table):
 
 class InvoicesTable(tables.Table):
 
-    transaction_id = tables.Column()
+    number = tables.Column()
     status = tables.Column()
     created = tables.DateColumn()
     billing_first_name = tables.Column()
diff --git a/aleksis/apps/tezor/templates/tezor/invoice/full.html b/aleksis/apps/tezor/templates/tezor/invoice/full.html
index add38a90fa88f33578f98b3282ae1f315d05a031..d2dd3fe7067fabd0a12166a3bc4f231c1338f66e 100644
--- a/aleksis/apps/tezor/templates/tezor/invoice/full.html
+++ b/aleksis/apps/tezor/templates/tezor/invoice/full.html
@@ -3,11 +3,11 @@
 
 {% load render_table from django_tables2 %}
 
-{% block browser_title %}{{ object.transaction_id }}{% endblock %}
+{% block browser_title %}{{ object.number }}{% endblock %}
 
 {% block content %}
 
-    <h1>{% trans "Invoice" %} {{ object.transaction_id }} — {{ object.created.date }}</h1>
+    <h1>{% trans "Invoice" %} {{ object.number }} — {{ object.created.date }}</h1>
     <a class="btn colour-primary waves-effect waves-light" href="{% url 'invoice_group_by_pk' object.group.pk %}">{% trans "Back" %}</a>
 
     {% render_table object.purchased_items_table %}
diff --git a/aleksis/apps/tezor/templates/tezor/invoice/payment.html b/aleksis/apps/tezor/templates/tezor/invoice/payment.html
index 7d51c9012f759d9865852a26064745beb640d0a2..838fa26a54bda50be6865880c7fd21d8c7cabab3 100644
--- a/aleksis/apps/tezor/templates/tezor/invoice/payment.html
+++ b/aleksis/apps/tezor/templates/tezor/invoice/payment.html
@@ -3,8 +3,8 @@
 {% load i18n %}
 {% load material_form %}
 
-{% block page_title %}{% blocktrans %}Make payment for{% endblocktrans %} {{ payment.transaction_id }}{% endblock %}
-{% block browser_title %}{% blocktrans %}Make payment for{% endblocktrans %} {{ payment.transaction_id }}{% endblock %}
+{% block page_title %}{% blocktrans %}Make payment for{% endblocktrans %} {{ payment.number }}{% endblock %}
+{% block browser_title %}{% blocktrans %}Make payment for{% endblocktrans %} {{ payment.number }}{% endblock %}
 
 {% block content %}
 <form action="{{ form.action }}" method="{{ form.method }}">