diff --git a/app/routers/cont_edu_cert_person.py b/app/routers/cont_edu_cert_person.py
index e20eafc..022135a 100644
--- a/app/routers/cont_edu_cert_person.py
+++ b/app/routers/cont_edu_cert_person.py
@@ -240,7 +240,7 @@ async def search_cont_edu_cert_person_obj_li(
         FROM `v_cont_edu_cert_person` AS cont_edu_cert_person
         WHERE cont_edu_cert_person.account_id = :account_id
             AND cont_edu_cert_person.cont_edu_cert_id IN :cont_edu_cert_id_list
-            AND cont_edu_cert_person.external_id LIKE :external_id
+            AND (cont_edu_cert_person.external_id LIKE :external_id OR cont_edu_cert_person.external_id IS NULL)
             AND (cont_edu_cert_person.given_name LIKE :given_name
             AND cont_edu_cert_person.family_name LIKE :family_name)
             AND cont_edu_cert_person.email LIKE :email