diff --git a/app/main/views/send.py b/app/main/views/send.py
index 5bd1ffc37..6ca253755 100644
--- a/app/main/views/send.py
+++ b/app/main/views/send.py
@@ -523,9 +523,12 @@ def _check_messages(service_id, template_type, upload_id, preview_row, letters_a
 
     count_of_recipients = len(list(recipients.rows))
 
-    if preview_row < count_of_recipients:
-        template.values = recipients[preview_row]
-    elif preview_row > 0:
+    if preview_row < 2:
+        abort(404)
+
+    if preview_row < count_of_recipients + 2:
+        template.values = recipients[preview_row - 2]
+    elif preview_row > 2:
         abort(404)
 
     session['upload_data']['notification_count'] = count_of_recipients
@@ -562,7 +565,7 @@ def _check_messages(service_id, template_type, upload_id, preview_row, letters_a
 @main.route("/services/<service_id>/<template_type>/check/<upload_id>/row-<int:row_index>", methods=['GET'])
 @login_required
 @user_has_permissions('send_texts', 'send_emails', 'send_letters')
-def check_messages(service_id, template_type, upload_id, row_index=0):
+def check_messages(service_id, template_type, upload_id, row_index=2):
 
     data = _check_messages(service_id, template_type, upload_id, row_index)
 
@@ -590,7 +593,7 @@ def check_messages(service_id, template_type, upload_id, row_index=0):
 @main.route("/services/<service_id>/<template_type>/check/<upload_id>/row-<int:row_index>.<filetype>", methods=['GET'])
 @login_required
 @user_has_permissions('send_texts', 'send_emails', 'send_letters')
-def check_messages_preview(service_id, template_type, upload_id, filetype, row_index=0):
+def check_messages_preview(service_id, template_type, upload_id, filetype, row_index=2):
     if filetype not in ('pdf', 'png'):
         abort(404)
 
diff --git a/app/templates/views/check/ok.html b/app/templates/views/check/ok.html
index 5724b3beb..aa9ca1cc8 100644
--- a/app/templates/views/check/ok.html
+++ b/app/templates/views/check/ok.html
@@ -60,10 +60,10 @@
       ) %}
         {% call index_field() %}
           <span>
-            {% if item.index == preview_row %}
+            {% if (item.index + 2) == preview_row %}
               {{ item.index + 2 }}
             {% else %}
-              <a href="{{ url_for('.check_messages', service_id=current_service.id, template_type=template.template_type, upload_id=upload_id, row_index=(item.index)) }}">{{ item.index + 2 }}</a>
+              <a href="{{ url_for('.check_messages', service_id=current_service.id, template_type=template.template_type, upload_id=upload_id, row_index=(item.index + 2)) }}">{{ item.index + 2 }}</a>
             {% endif %}
           </span>
         {% endcall %}
diff --git a/tests/app/main/views/test_send.py b/tests/app/main/views/test_send.py
index 70fa17051..606f877c1 100644
--- a/tests/app/main/views/test_send.py
+++ b/tests/app/main/views/test_send.py
@@ -472,13 +472,13 @@ def test_upload_valid_csv_redirects_to_check_page(
         'Test Service: A, Template <em>content</em> with & entity',
     ),
     (
-        {'row_index': 0},
+        {'row_index': 2},
         None,
         'To: 07700900001',
         'Test Service: A, Template <em>content</em> with & entity',
     ),
     (
-        {'row_index': 2},
+        {'row_index': 4},
         True,
         'To: 07700900003',
         'Test Service: C, Template <em>content</em> with & entity',
@@ -524,7 +524,7 @@ def test_upload_valid_csv_shows_preview_and_table(
 
     if expected_link_in_first_row:
         assert page.select_one('.table-field-index a')['href'] == url_for(
-            'main.check_messages', service_id=SERVICE_ONE_ID, template_type='sms', upload_id=fake_uuid, row_index=0
+            'main.check_messages', service_id=SERVICE_ONE_ID, template_type='sms', upload_id=fake_uuid, row_index=2
         )
     else:
         assert not page.select_one('.table-field-index').select_one('a')
@@ -546,9 +546,12 @@ def test_upload_valid_csv_shows_preview_and_table(
 
 
 @pytest.mark.parametrize('row_index, expected_status', [
-    (0, 200),
+    (0, 404),
+    (1, 404),
     (2, 200),
-    (3, 404),
+    (3, 200),
+    (4, 200),
+    (5, 404),
 ])
 def test_404_for_previewing_a_row_out_of_range(
     client_request,
@@ -1480,11 +1483,11 @@ def test_can_start_letters_job(
         {'postcode': 'abc123', 'addressline1': '123 street'},
     ),
     (
-        {'row_index': 0},
+        {'row_index': 2},
         {'postcode': 'abc123', 'addressline1': '123 street'},
     ),
     (
-        {'row_index': 1},
+        {'row_index': 3},
         {'postcode': 'cba321', 'addressline1': '321 avenue'},
     ),
 ])