diff --git a/fieldExtraction/src/utils/string_utils.py b/fieldExtraction/src/utils/string_utils.py
index f8cd2f5..51de850 100644
--- a/fieldExtraction/src/utils/string_utils.py
+++ b/fieldExtraction/src/utils/string_utils.py
@@ -348,7 +348,7 @@ def is_empty(value: str | list | pd.Series, pd_mask: bool = True) -> bool | pd.S
         if not value or value.isspace():
             return True
         lower_stripped = value.lower().strip()
-        if lower_stripped in ["n/a", "na", "null", "none", "nan"]:
+        if lower_stripped in ["n/a", "na", "null", "none", "nan", "no_identifiers_found"]:
             return True
 
     return value in empty_values