diff --git a/abonapp/migrations/0005_auto_20180123_1353.py b/abonapp/migrations/0005_auto_20180123_1353.py
new file mode 100644
index 0000000..b2705a6
--- /dev/null
+++ b/abonapp/migrations/0005_auto_20180123_1353.py
@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11 on 2018-01-23 13:53
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('abonapp', '0004_auto_20180122_1732'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='alltimepaylog',
+            name='receipt_num',
+            field=models.BigIntegerField(default=0, verbose_name='Receipt number'),
+        ),
+    ]
diff --git a/abonapp/models.py b/abonapp/models.py
index 34e59a1..676d23a 100644
--- a/abonapp/models.py
+++ b/abonapp/models.py
@@ -339,7 +339,7 @@ class AllTimePayLog(models.Model):
     date_add = models.DateTimeField(auto_now_add=True)
     summ = models.FloatField(default=0.0)
     trade_point = models.CharField(_('Trade point'), max_length=20, default=None, null=True, blank=True)
-    receipt_num = models.IntegerField(_('Receipt number'), default=0)
+    receipt_num = models.BigIntegerField(_('Receipt number'), default=0)
 
     objects = AllTimePayLogManager()
 
diff --git a/abonapp/pay_systems.py b/abonapp/pay_systems.py
index 261be3c..b5b4b62 100644
--- a/abonapp/pay_systems.py
+++ b/abonapp/pay_systems.py
@@ -12,13 +12,17 @@ SERV_ID = getattr(settings, 'PAY_SERV_ID')
 
 def allpay(request):
 
-    def bad_ret(err_id):
+    def bad_ret(err_id, err_description=None):
         current_date = timezone.now()
-        return "<?xml version='1.0' encoding='UTF-8'?>\n" \
-               "<pay-response>\n" \
-               "  <status_code>%d</status_code>\n" % safe_int(err_id) +\
-               "  <time_stamp>%s</time_stamp>\n" % current_date.strftime("%d.%m.%Y %H:%M:%S") +\
-               "</pay-response>"
+        res = [
+            "<?xml version='1.0' encoding='UTF-8'?>",
+            "<pay-response>",
+            "  <status_code>%d</status_code>" % safe_int(err_id),
+            "  <time_stamp>%s</time_stamp>" % current_date.strftime("%d.%m.%Y %H:%M:%S"),
+            "  <description>%s</description>" % err_description if err_description is not None else '',
+            "</pay-response>"
+        ]
+        return '\n'.join(res)
 
     try:
         serv_id = request.GET.get('SERVICE_ID')
@@ -36,8 +40,8 @@ def allpay(request):
         if our_sign != sign:
             return bad_ret(-101)
 
-        if act <= 0: return bad_ret(-101)
-        if pay_account == 0: return bad_ret(-40)
+        if act <= 0: return bad_ret(-101, 'ACT less than zero')
+        if pay_account == 0: return bad_ret(-40, 'PAY_ACCOUNT is not passed')
 
         if act == 1:
             abon = Abon.objects.get(username=pay_account)
@@ -99,7 +103,7 @@ def allpay(request):
                    "  </transaction>\n" \
                    "</pay-response>"
         else:
-            return bad_ret(-101)
+            return bad_ret(-101, 'ACT is not passed')
 
     except Abon.DoesNotExist:
         return bad_ret(-40)