diff --git a/arm_statements/status.py b/arm_statements/status.py
index 02be8f8..25a2ccf 100644
--- a/arm_statements/status.py
+++ b/arm_statements/status.py
@@ -86,7 +86,7 @@ def status_input(document: StatementDocument) -> StatusInput:
     return StatusInput(
         document_type=document.document_type,
         layout_found=document.lines != (),
-        has_organization_or_inn=header.organization_name.value is not None or header.inn.value is not None,
+        has_organization_or_inn=bool(header.organization_name.value or header.inn.value),
         period_known=period_known,
         needs_review_fields=header.needs_review_fields,
         lines=tuple(StatusLine(line.line_status, line.needs_review) for line in document.lines),
diff --git a/arm_statements/tests/test_status.py b/arm_statements/tests/test_status.py
index ec5c9b2..0952f37 100644
--- a/arm_statements/tests/test_status.py
+++ b/arm_statements/tests/test_status.py
@@ -2,6 +2,7 @@ from dataclasses import replace
 from datetime import date
 from decimal import Decimal as D
 
+from arm_statements import status_input_from_contract, to_contract
 from arm_statements.header import parse_header
 from arm_statements.issues import make_warning
 from arm_statements.loader import Rules
@@ -10,6 +11,7 @@ from arm_statements.model import (
     DocumentType,
     EnvelopeStatus,
     FormVariant,
+    HeaderField,
     LineStatus,
     PeriodKind,
     Severity,
@@ -115,3 +117,12 @@ def test_status_input_from_document(rules: Rules) -> None:
     assert document_status(data) is DONE
     empty = replace(doc, columns=(), lines=(), checks=None)
     assert (status_input(empty).layout_found, status_input(empty).period_known) == (False, False)
+
+
+def test_empty_string_organization_and_inn_mean_absent(rules: Rules) -> None:
+    """M-1: пустая строка в шапке — «нет»; совпадает с расчётом по контракту."""
+    empty = HeaderField("", 100.0, "")
+    head = replace(parse_header(hdr(), rules), organization_name=empty, inn=empty)
+    doc = StatementDocument(DocumentType.BALANCE, None, "l", head, (), (), None, DONE, ())
+    assert status_input(doc).has_organization_or_inn is False
+    assert status_input_from_contract(to_contract(doc)).has_organization_or_inn is False