diff --git a/api/app/services/anaf_service.py b/api/app/services/anaf_service.py
index 993bc08..5bc24c3 100644
--- a/api/app/services/anaf_service.py
+++ b/api/app/services/anaf_service.py
@@ -11,11 +11,14 @@ _DIACRITICS = str.maketrans('ĂăÂâÎîȘșȚțŞşŢţ', 'AAAAIISSTTSSTT')
 
 
 def strip_ro_prefix(cod_fiscal: str) -> str:
-    """Normalize CUI: strip whitespace, uppercase, remove 'RO' prefix."""
+    """Normalize CUI: strip whitespace, uppercase, remove 'RO' prefix, fix OCR-like typos."""
     if not cod_fiscal:
         return ""
     cleaned = cod_fiscal.strip().upper()
-    return re.sub(r'^RO\s*', '', cleaned)
+    cleaned = re.sub(r'^RO\s*', '', cleaned)
+    # Fix common character confusions in CUI (O→0, I→1, L→1, B→8)
+    cleaned = cleaned.translate(str.maketrans('OIL', '011'))
+    return cleaned
 
 
 def validate_cui(bare_cui: str) -> bool: