diff --git a/src/caselawclient/models/neutral_citation_mixin.py b/src/caselawclient/models/neutral_citation_mixin.py
index 7f5c38df..99e2976d 100644
--- a/src/caselawclient/models/neutral_citation_mixin.py
+++ b/src/caselawclient/models/neutral_citation_mixin.py
@@ -23,11 +23,6 @@ class NeutralCitationMixin(ABC):
 
     def __init__(self, document_noun: str, *args: Any, **kwargs: Any) -> None:
         self.attributes_to_validate: list[tuple[str, bool, str]] = self.attributes_to_validate + [
-            (
-                "has_ncn",
-                True,
-                f"This {document_noun} has no neutral citation number",
-            ),
             (
                 "has_valid_ncn",
                 True,
@@ -42,11 +37,6 @@ def __init__(self, document_noun: str, *args: Any, **kwargs: Any) -> None:
     @deprecated("Legacy usage of NCNs is deprecated; you should be moving to the Identifiers framework")
     def neutral_citation(self) -> Optional[NeutralCitationString]: ...
 
-    @cached_property
-    @deprecated("Legacy usage of NCNs is deprecated; you should be moving to the Identifiers framework")
-    def has_ncn(self) -> bool:
-        return self.neutral_citation is not None and self.neutral_citation != ""
-
     @cached_property
     @deprecated("Legacy usage of NCNs is deprecated; you should be moving to the Identifiers framework")
     def has_valid_ncn(self) -> bool:
diff --git a/tests/models/test_judgments.py b/tests/models/test_judgments.py
index af43bb2f..12c49658 100644
--- a/tests/models/test_judgments.py
+++ b/tests/models/test_judgments.py
@@ -7,7 +7,6 @@
 from caselawclient.models.documents import DocumentURIString
 from caselawclient.models.identifiers.neutral_citation import NeutralCitationNumber
 from caselawclient.models.judgments import Judgment
-from caselawclient.models.neutral_citation_mixin import NeutralCitationString
 
 
 class TestJudgment:
@@ -19,16 +18,6 @@ def test_best_identifier(self, mock_api_client):
 
 
 class TestJudgmentValidation:
-    def test_has_ncn(self, mock_api_client):
-        document_with_ncn = Judgment(DocumentURIString("test/1234"), mock_api_client)
-        document_with_ncn.neutral_citation = NeutralCitationString("[2023] TEST 1234")
-
-        document_without_ncn = Judgment(DocumentURIString("test/1234"), mock_api_client)
-        document_without_ncn.neutral_citation = NeutralCitationString("")
-
-        assert document_with_ncn.has_ncn is True
-        assert document_without_ncn.has_ncn is False
-
     def test_judgment_neutral_citation(self, mock_api_client):
         mock_api_client.get_judgment_xml_bytestring.return_value = b"""
             <akomaNtoso xmlns:uk="https://caselaw.nationalarchives.gov.uk/akn"
@@ -85,7 +74,6 @@ def test_judgment_validation_failure_messages_if_failing(self, mock_api_client):
         judgment.is_parked = True
         judgment.is_held = True
         judgment.has_name = False
-        judgment.has_ncn = False
         judgment.has_valid_ncn = False
         judgment.has_valid_court = False
 
@@ -95,7 +83,6 @@ def test_judgment_validation_failure_messages_if_failing(self, mock_api_client):
                 "This judgment is currently parked at a temporary URI",
                 "This judgment is currently on hold",
                 "This judgment has no name",
-                "This judgment has no neutral citation number",
                 "The neutral citation number of this judgment is not valid",
                 "The court for this judgment is not valid",
             ],
diff --git a/tests/models/test_press_summaries.py b/tests/models/test_press_summaries.py
index d5bf3251..7a2df75d 100644
--- a/tests/models/test_press_summaries.py
+++ b/tests/models/test_press_summaries.py
@@ -6,7 +6,6 @@
 from caselawclient.factories import JudgmentFactory
 from caselawclient.models.documents import DocumentURIString
 from caselawclient.models.identifiers.neutral_citation import NeutralCitationNumber
-from caselawclient.models.neutral_citation_mixin import NeutralCitationString
 from caselawclient.models.press_summaries import PressSummary
 
 
@@ -19,16 +18,6 @@ def test_best_identifier(self, mock_api_client):
 
 
 class TestPressSummaryValidation:
-    def test_has_ncn(self, mock_api_client):
-        document_with_ncn = PressSummary(DocumentURIString("test/1234"), mock_api_client)
-        document_with_ncn.neutral_citation = NeutralCitationString("[2023] TEST 1234")
-
-        document_without_ncn = PressSummary(DocumentURIString("test/1234"), mock_api_client)
-        document_without_ncn.neutral_citation = NeutralCitationString("")
-
-        assert document_with_ncn.has_ncn is True
-        assert document_without_ncn.has_ncn is False
-
     def test_press_summary_neutral_citation(self, mock_api_client):
         mock_api_client.get_judgment_xml_bytestring.return_value = b"""
         <akomaNtoso xmlns:uk="https://caselaw.nationalarchives.gov.uk/akn"
@@ -94,7 +83,6 @@ def test_press_summary_validation_failure_messages_if_failing(
         press_summary.is_parked = True
         press_summary.is_held = True
         press_summary.has_name = False
-        press_summary.has_ncn = False
         press_summary.has_valid_ncn = False
         press_summary.has_valid_court = False
 
@@ -104,7 +92,6 @@ def test_press_summary_validation_failure_messages_if_failing(
                 "This press summary is currently parked at a temporary URI",
                 "This press summary is currently on hold",
                 "This press summary has no name",
-                "This press summary has no neutral citation number",
                 "The neutral citation number of this press summary is not valid",
                 "The court for this press summary is not valid",
             ],