diff --git a/legal-api/src/legal_api/services/filings/validations/annual_report.py b/legal-api/src/legal_api/services/filings/validations/annual_report.py
index e0e4411172..01b667e399 100644
--- a/legal-api/src/legal_api/services/filings/validations/annual_report.py
+++ b/legal-api/src/legal_api/services/filings/validations/annual_report.py
@@ -19,6 +19,7 @@
 
 from legal_api.errors import Error
 from legal_api.models import Address, Business
+from legal_api.services.filings.validations.common_validations import _validate_postal_code
 from legal_api.services.utils import get_date
 from legal_api.utils.datetime import datetime
 
@@ -152,12 +153,11 @@ def validate_directors_addresses(annual_report: dict, legal_type: str) -> Option
     msg = []
     directors = annual_report["filing"]["annualReport"].get("directors", [])
 
-     # Required fields for mailingAddress
+    # Required fields for mailingAddress
     mailing_required_fields = [
         "streetAddress",
         "addressCity",
-        "addressCountry",
-        "postalCode"
+        "addressCountry"
     ]
 
     for idx, director in enumerate(directors):
@@ -177,6 +177,10 @@ def validate_directors_addresses(annual_report: dict, legal_type: str) -> Option
                             "path": f"/filing/annualReport/directors/{idx}/{address_type}/{field}"
                         })
 
+                postal_error = _validate_postal_code(address,f"/filing/annualReport/directors/{idx}/{address_type}")
+                if postal_error:
+                    msg.append(postal_error)
+
     if msg:
         return Error(HTTPStatus.BAD_REQUEST, msg)
 
diff --git a/legal-api/tests/unit/services/filings/validations/annual_report/test_validation.py b/legal-api/tests/unit/services/filings/validations/annual_report/test_validation.py
index 4ff106e3d7..d2efd7cf66 100644
--- a/legal-api/tests/unit/services/filings/validations/annual_report/test_validation.py
+++ b/legal-api/tests/unit/services/filings/validations/annual_report/test_validation.py
@@ -94,6 +94,29 @@ def test_validate(session, test_name, now, ar_date, agm_date,
                 }
             ]
         ),
+        (
+            "missing_mailingAddress_postalCode_required",
+            {"streetAddress": "123 A St", "addressCity": "Vancouver", "addressCountry": "CA", "postalCode": "V5K0A1"},
+            {"streetAddress": "123 A St", "addressCity": "Vancouver", "addressCountry": "CA", "postalCode": ""},
+            [
+                {
+                    "error": "Postal code is required.",
+                    "path": "/filing/annualReport/directors/0/mailingAddress/postalCode"
+                }
+            ]
+        ),
+        (
+            "SUCCESS_missing_mailingAddress_postalCode_not_required",
+            {"streetAddress": "123 A St", "addressCity": "Vancouver", "addressCountry": "CA", "postalCode": "V5K0A1"},
+            {"streetAddress": "123 A St", "addressCity": "Vancouver", "addressCountry": "HK", "postalCode": ""},
+            None
+        ),
+        (
+            "SUCCESS_no_validation_on_postalCode_for_deliveryAddress",
+            {"streetAddress": "123 A St", "addressCity": "Vancouver", "addressCountry": "CA", "postalCode": ""},
+            {"streetAddress": "123 A St", "addressCity": "Vancouver", "addressCountry": "CA", "postalCode": "V5K0A1"},
+            None
+        ),
         (
             "missing_mailing_address",
             {"streetAddress": "123 A St", "addressCity": "Vancouver", "addressCountry": "CA", "postalCode": "V5K0A1"},