diff --git a/src/apps/external_data/migrations/0010_alter_prosecutor_check_control_authority.py b/src/apps/external_data/migrations/0010_alter_prosecutor_check_control_authority.py
new file mode 100644
index 0000000..736e319
--- /dev/null
+++ b/src/apps/external_data/migrations/0010_alter_prosecutor_check_control_authority.py
@@ -0,0 +1,15 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("external_data", "0009_arbitration_case_claim_amount"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="prosecutorcheck",
+            name="control_authority",
+            field=models.TextField(verbose_name="контрольный орган"),
+        ),
+    ]
diff --git a/src/apps/external_data/models.py b/src/apps/external_data/models.py
index bb93c8b..090dafb 100644
--- a/src/apps/external_data/models.py
+++ b/src/apps/external_data/models.py
@@ -101,7 +101,7 @@ class ProsecutorCheck(UUIDPrimaryKeyMixin, TimestampMixin, models.Model):
         _("регистрационный номер"), max_length=64, db_index=True
     )
     law_type = models.CharField(_("тип закона"), max_length=32, db_index=True)
-    control_authority = models.CharField(_("контрольный орган"), max_length=255)
+    control_authority = models.TextField(_("контрольный орган"))
     prosecutor_office = models.CharField(
         _("прокуратура"), max_length=255, blank=True, default=""
     )
diff --git a/tests/apps/exchange/test_api.py b/tests/apps/exchange/test_api.py
index 3167e91..2956002 100644
--- a/tests/apps/exchange/test_api.py
+++ b/tests/apps/exchange/test_api.py
@@ -489,6 +489,7 @@ class ExchangePackageApiTest(APITestCase):
             response.data["result"]["financial_reports"]["created_lines"],
             1,
         )
+
         self.assertEqual(
             response.data["result"]["defense_unreliable_suppliers"]["created"],
             1,
@@ -535,6 +536,25 @@ class ExchangePackageApiTest(APITestCase):
         self.assertEqual(package_import.delivery_channel, ExchangeDeliveryChannel.API)
         self.assertEqual(package_import.status, "success")
 
+    def test_upload_preserves_long_prosecutor_control_authority(self):
+        payload = build_exchange_payload()
+        long_authority = "Межрегиональное контрольное управление " + "А" * 300
+        payload["prosecutor_checks"][0]["control_authority"] = long_authority
+        archive = build_exchange_archive(data=payload)
+
+        response = self.client.post(
+            self.url,
+            {"file": archive},
+            format="multipart",
+            HTTP_X_EXCHANGE_TOKEN=TEST_TOKEN,
+        )
+
+        self.assertEqual(response.status_code, status.HTTP_201_CREATED)
+        self.assertEqual(
+            ProsecutorCheck.objects.get().control_authority,
+            long_authority,
+        )
+
     def test_upload_rejects_invalid_exchange_token(self):
         archive = build_exchange_archive(data=build_exchange_payload())
         invalid_token = get_random_string(24)