diff --git a/src/pretix/base/exporter.py b/src/pretix/base/exporter.py
index 0654d7f08f..49439007d4 100644
--- a/src/pretix/base/exporter.py
+++ b/src/pretix/base/exporter.py
@@ -131,6 +131,7 @@ class JSONExporter(BaseExporter):
                                 'variation': position.variation_id,
                                 'price': position.price,
                                 'attendee_name': position.attendee_name,
+                                'secret': position.secret,
                                 'answers': [
                                     {
                                         'question': answer.question_id,
diff --git a/src/pretix/base/migrations/0010_orderposition_secret.py b/src/pretix/base/migrations/0010_orderposition_secret.py
new file mode 100644
index 0000000000..e9f2da8707
--- /dev/null
+++ b/src/pretix/base/migrations/0010_orderposition_secret.py
@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.2 on 2016-03-03 17:13
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+import pretix.base.models.orders
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0009_auto_20160222_2002'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='orderposition',
+            name='secret',
+            field=models.CharField(default=pretix.base.models.orders.generate_position_secret, max_length=64),
+        ),
+    ]
diff --git a/src/pretix/base/models/__init__.py b/src/pretix/base/models/__init__.py
index 623016d7d3..7a0db98b34 100644
--- a/src/pretix/base/models/__init__.py
+++ b/src/pretix/base/models/__init__.py
@@ -7,7 +7,7 @@ from .items import (
 from .log import LogEntry
 from .orders import (
     AbstractPosition, CachedTicket, CartPosition, InvoiceAddress, Order,
-    OrderPosition, QuestionAnswer, generate_secret,
+    OrderPosition, QuestionAnswer, generate_position_secret, generate_secret,
 )
 from .organizer import Organizer, OrganizerPermission, OrganizerSetting
 from .vouchers import Voucher
@@ -17,5 +17,5 @@ __all__ = [
     'ItemCategory', 'Item', 'Property', 'PropertyValue', 'ItemVariation', 'VariationsField', 'Question',
     'BaseRestriction', 'Quota', 'Order', 'CachedTicket', 'QuestionAnswer', 'AbstractPosition', 'OrderPosition',
     'CartPosition', 'EventSetting', 'OrganizerSetting', 'EventLock', 'cachedfile_name', 'itempicture_upload_to',
-    'generate_secret', 'Voucher', 'LogEntry', 'InvoiceAddress'
+    'generate_secret', 'Voucher', 'LogEntry', 'InvoiceAddress', 'generate_position_secret'
 ]
diff --git a/src/pretix/base/models/orders.py b/src/pretix/base/models/orders.py
index 991ea62aa8..35ab765986 100644
--- a/src/pretix/base/models/orders.py
+++ b/src/pretix/base/models/orders.py
@@ -19,6 +19,11 @@ def generate_secret():
     return ''.join(random.choice(string.ascii_letters + string.digits) for _ in range(16))
 
 
+def generate_position_secret():
+    # Exclude o,0,1,i,l to avoid confusion with bad fonts/printers
+    return ''.join(random.choice('abcdefghjkmnpqrstuvwxyz23456789') for _ in range(32))
+
+
 class Order(LoggedModel):
     """
     An order is created when a user clicks 'buy' on his cart. It holds
@@ -371,6 +376,7 @@ class OrderPosition(AbstractPosition):
         max_digits=10, decimal_places=2,
         verbose_name=_('Tax value')
     )
+    secret = models.CharField(max_length=64, default=generate_position_secret)
 
     class Meta:
         verbose_name = _("Order position")
diff --git a/src/pretix/plugins/ticketoutputpdf/ticketoutput.py b/src/pretix/plugins/ticketoutputpdf/ticketoutput.py
index 27cb913429..ca344aa89c 100644
--- a/src/pretix/plugins/ticketoutputpdf/ticketoutput.py
+++ b/src/pretix/plugins/ticketoutputpdf/ticketoutput.py
@@ -69,7 +69,7 @@ class PdfTicketOutput(BaseTicketOutput):
             qr_s = self.settings.get('qr_s', default=80, as_type=float)
             if qr_s:
                 reqs = qr_s * units.mm
-                qrw = QrCodeWidget(op.id, barLevel='H')
+                qrw = QrCodeWidget(op.secret, barLevel='H')
                 b = qrw.getBounds()
                 w = b[2] - b[0]
                 h = b[3] - b[1]
@@ -84,7 +84,7 @@ class PdfTicketOutput(BaseTicketOutput):
                 p.setFont("Helvetica", code_s)
                 code_x = self.settings.get('code_x', default=15, as_type=float)
                 code_y = self.settings.get('code_y', default=130, as_type=float)
-                p.drawString(code_x * units.mm, code_y * units.mm, op.id)
+                p.drawString(code_x * units.mm, code_y * units.mm, op.secret)
 
             p.showPage()