diff --git a/backend/api/v1/modules/a76/csv_templates/registry.py b/backend/api/v1/modules/a76/csv_templates/registry.py
index b14ae3a6..b17906b3 100644
--- a/backend/api/v1/modules/a76/csv_templates/registry.py
+++ b/backend/api/v1/modules/a76/csv_templates/registry.py
@@ -49,6 +49,168 @@ from api.v1.modules.a76.layouts_csv.transportistas.template_config import (
 )
 
 
+def _normalize_header_for_match(header: str) -> str:
+    """Normaliza cabeceras para comparación interna (sin alterar salida)."""
+    if not header:
+        return ""
+    cleaned = header.strip()
+    if cleaned.startswith("* "):
+        cleaned = cleaned[2:]
+    return cleaned.strip().upper()
+
+
+ALWAYS_REQUIRED_HEADERS_BY_TEMPLATE: Dict[str, set[str]] = {
+    # Facturas encabezados
+    "imp_temp_header": {
+        "NUMERO FACTURA",
+        "FECHA FACTURA",
+        "REGIMEN",
+        "CLAVE PROVEEDOR",
+        "CLAVE VENDIDO A",
+        "CLAVE ENVIADO A",
+        "AGENTE ADUANAL",
+        "ADUANA DE CRUCE",
+    },
+    "imp_def_header": {
+        "NUMERO FACTURA",
+        "FECHA FACTURA",
+        "REGIMEN",
+        "CLAVE PROVEEDOR",
+        "CLAVE VENDIDO A",
+        "CLAVE ENVIADO A",
+        "AGENTE ADUANAL",
+    },
+    "exp_def_header": {
+        "NUMERO FACTURA",
+        "FECHA FACTURA",
+        "REGIMEN",
+        "CLAVE PROVEEDOR",
+        "CLAVE VENDIDO A",
+        "CLAVE ENVIADO A",
+        "AGENTE ADUANAL",
+        "ADUANA DE CRUCE",
+    },
+    "cmex_header": {
+        "NUMERO FACTURA",
+        "FECHA FACTURA",
+        "CLAVE PROVEEDOR",
+        "CLAVE VENDIDO A",
+        "CLAVE ENVIADO A",
+    },
+    # Facturas partidas (plantillas del registry)
+    "imp_temp_details": {
+        "NUMERO FACTURA",
+        "CLASE",
+        "CANTIDAD IMPORTADA",
+        "COSTO UNITARIO",
+        "PESO NETO",
+        "PAIS ORIGEN",
+        "PREFERENCIA ARANCELARIA",
+    },
+    "imp_def_details": {
+        "NUMERO FACTURA",
+        "CLASE",
+        "CANTIDAD IMPORTADA",
+        "COSTO UNITARIO",
+        "PESO NETO",
+        "PAIS ORIGEN",
+        "PREFERENCIA ARANCELARIA",
+        "NUM. PARTE",
+    },
+    "exp_def_details": {
+        "NUMERO FACTURA",
+        "CLASE",
+        "CANTIDAD IMPORTADA",
+        "COSTO UNITARIO",
+        "PESO NETO",
+        "PAIS ORIGEN",
+        "PREFERENCIA ARANCELARIA",
+    },
+    "cmex_details": {
+        "NUMERO FACTURA",
+        "CLASE",
+        "CANTIDAD IMPORTADA",
+        "COSTO UNITARIO",
+        "PESO NETO",
+        "PAIS ORIGEN",
+        "PREFERENCIA ARANCELARIA",
+        "NUM. PARTE",
+    },
+    # Facturas series (plantillas del registry)
+    "imp_temp_series": {"NUMERO FACTURA", "LINEA FACTURA"},
+    "imp_def_series": {"NUMERO FACTURA", "LINEA FACTURA"},
+    "cmex_series": {"NUMERO FACTURA", "LINEA FACTURA"},
+    # Catálogos y transportes
+    "customs_brokers": {"TIPO", "CLAVE", "NOMBRE"},
+    "clients_providers": {"PROCEDENCIA", "SHORT_NAME", "NOMBRE", "RFC"},
+    "exchange_rates": {"FECHA", "VALOR"},
+    "american_fractions": {"FRACCION_ARANCELARIA", "DESCRIPCION"},
+    "material_classes": {
+        "CLAVE CLASE",
+        "CLASE",
+        "DESCRIPCION ESPAÑOL",
+        "DESCRIPCIONE",
+        "TIPO DE MATERIAL",
+        "CLAVEMAT",
+        "U.M. COMERCIAL",
+        "UNIMED",
+        "FRACCION ARANCELARIA",
+        "FRACCION",
+    },
+    "part_numbers": {
+        "NUMERO DE PARTE",
+        "NUMPARTE",
+        "DESCRIPCION EN ESPAÑOL",
+        "DESCRIPCIONE",
+        "UNIDAD DE MEDIDA COMERCIAL",
+        "UNIMED",
+    },
+    "items": {
+        "NUMERO DE PARTE",
+        "NUMPARTE",
+        "DESCRIPCION EN ESPAÑOL",
+        "DESCRIPCIONE",
+        "UNIDAD DE MEDIDA COMERCIAL",
+        "UNIMED",
+    },
+    "boms": {"NUMPARTE_PADRE", "NUMPARTE_COMPONENTE", "CANTIDAD"},
+    "pedimentos": {
+        "AÑO", "PATENTE", "NUMERO", "PEDIMENTO",
+        "TIPO_OPERACION",
+        "CLAVE_PEDIMENTO",
+        "REGIMEN",
+        "FECHA_INICIO",
+        "FECHA_FINAL",
+        "FECHA_PAGO",
+        "ADUANA_SECCION_CRUCE",
+    },
+    "transports": {"CLAVE", "CODIGO DE ENTIDAD"},
+    "drivers": {"TRANSPORTISTA", "LINEA", "CLAVE CONDUCTOR"},
+    "trailers": {"NUMERO TRAILER"},
+    "transporters": {"CLAVE TRANSPORTISTA", "NOMBRE"},
+}
+
+
+def _apply_required_prefix(template_id: str, headers: List[str]) -> List[str]:
+    """Prefija '* ' a cabeceras siempre obligatorias para la plantilla."""
+    required_headers = ALWAYS_REQUIRED_HEADERS_BY_TEMPLATE.get(template_id)
+    if not required_headers:
+        return headers
+
+    required_norm = {_normalize_header_for_match(h) for h in required_headers}
+    out: List[str] = []
+    for header in headers:
+        norm_header = _normalize_header_for_match(header)
+        if norm_header and norm_header in required_norm:
+            if header.startswith("* "):
+                out.append(header)
+            else:
+                out.append(f"* {header}")
+        else:
+            out.append(header)
+    return out
+
+
 def _canonicals_from_columns(cols: Optional[List[Dict]]) -> List[str]:
     """Extrae la lista de nombres canónicos en orden a partir de una lista de columnas."""
     if not cols:
@@ -163,7 +325,10 @@ TEMPLATE_FILENAMES: Dict[str, str] = {
 
 def get_template_headers(template_id: str) -> Optional[List[str]]:
     """Devuelve la lista de cabeceras canónicas para el template_id, o None si no existe."""
-    return _TEMPLATE_HEADERS.get(template_id)
+    headers = _TEMPLATE_HEADERS.get(template_id)
+    if headers is None:
+        return None
+    return _apply_required_prefix(template_id, headers)
 
 
 def get_template_filename(template_id: str) -> str:
diff --git a/frontend/src/lib/config/csv-upload.ts b/frontend/src/lib/config/csv-upload.ts
index 6d1915b0..426880c2 100644
--- a/frontend/src/lib/config/csv-upload.ts
+++ b/frontend/src/lib/config/csv-upload.ts
@@ -248,7 +248,8 @@ export const catalogosConfig: CsvUploadItem[] = [
         icon: Briefcase,
         modelTarget: 'Bom',
         templateId: 'boms',
-        layoutModule: 'layouts_csv/boms'
+        layoutModule: 'layouts_csv/boms',
+        disabled: true
     },
     {
         id: 'items',