diff --git a/src/Utils/utils.py b/src/Utils/utils.py
index 6308896..6ea96f7 100644
--- a/src/Utils/utils.py
+++ b/src/Utils/utils.py
@@ -400,6 +400,32 @@ def convert_datetime_to_iso(data):
         for item in data:
             convert_datetime_to_iso(item)
 
+def convert_iso_to_dmY(data):
+    """
+    Convert ISO format datetime strings or datetime objects to 'dd/MM/YYYY' format
+    """
+    def convert_single_value(value):
+        if isinstance(value, str):
+            try:
+                # Try to parse the string as an ISO format datetime
+                dt = datetime.fromisoformat(value)
+                return dt.strftime('%d/%m/%Y')
+            except ValueError:
+                # If it's not a valid ISO format, return the original string
+                return value
+        elif isinstance(value, datetime):
+            # If it's already a datetime object, just format it
+            return value.strftime('%d/%m/%Y')
+        else:
+            # For any other type, return as is
+            return value
+
+    if isinstance(data, dict):
+        return {key: convert_iso_to_dmY(value) for key, value in data.items()}
+    elif isinstance(data, list):
+        return [convert_iso_to_dmY(item) for item in data]
+    else:
+        return convert_single_value(data)
 
 def get_currencies_from_txt(file_path:str ="config/currencies.txt"):
     # Read the file and return a list of currency codes
diff --git a/src/api.py b/src/api.py
index 0147f07..fd991c3 100644
--- a/src/api.py
+++ b/src/api.py
@@ -20,9 +20,9 @@
 from src.ldap_authen import (User, get_current_user, ldap_authen, 
                              Token, create_access_token)
 from src.Utils.utils import (read_config, get_current_time, is_base64, 
-                             valid_base64_image, convert_datetime_to_iso,
+                             valid_base64_image, convert_datetime_to_iso, convert_iso_to_dmY,
                              get_land_and_city_list, get_currencies_from_txt)
-from src.invoice_extraction import extract_invoice_info
+from src.invoice_extraction import extract_invoice_info, validate_invoice
 from src.Utils.logger import create_logger
 from src.export_excel.main import export_json_to_excel
 
@@ -351,9 +351,20 @@ async def modify_invoice(invoice_uuid: str, request: Request):
                 status_code=status.HTTP_400_BAD_REQUEST,
                 content=msg)
         
+        logger.debug(msg = f"invoice_info.keys {invoice_info.keys()}")
+
+        invoice_info['invoice_info'] = convert_iso_to_dmY(invoice_info['invoice_info'])
+
+        invoice_dict = validate_invoice(invoice_info=invoice_info, 
+                                             invoice_type=invoice_info['invoice_type'], 
+                                             config=config)
+        
+        logger.debug(msg = f"invoice_dict['invoice_info']: {invoice_dict['invoice_info']}")
+
+
         # Prepare update fields
         update_fields = {
-            "invoice_info": invoice_info,
+            "invoice_info": invoice_dict['invoice_info'],
             "last_modified_at": get_current_time(timezone=config['timezone']),
             "last_modified_by": user_uuid
         }
diff --git a/src/invoice_extraction.py b/src/invoice_extraction.py
index 320899f..52d34de 100644
--- a/src/invoice_extraction.py
+++ b/src/invoice_extraction.py
@@ -2,6 +2,7 @@
 sys.path.append("") 
 import re
 import numpy as np
+from copy import deepcopy
 from sklearn.feature_extraction.text import TfidfVectorizer
 from sklearn.metrics.pairwise import cosine_similarity
 from typing import List, Optional
@@ -133,23 +134,25 @@ def extract_invoice_info(base64_img:str, ocr_reader:OcrReader,
 
 
 
-def validate_invoice(invoice_info:dict, invoice_type:str, config:dict) ->dict:
-    
-    if invoice_type == "invoice 1":
-        valid_invoice = validate_invoice_1(invoice_data=invoice_info, config=config)
-        full_invoice = Invoice1(invoice_info=valid_invoice['invoice_info'])
+def validate_invoice(invoice_info: dict, invoice_type: str, config: dict) -> dict:
+    # Create a deep copy of the invoice_info to avoid modifying the original
+    invoice_info_copy = deepcopy(invoice_info)
 
-    
-    elif invoice_type == "invoice 2":
-        valid_invoice = validate_invoice_2(invoice_data=invoice_info, config=config)
-        full_invoice = Invoice2(invoice_info=valid_invoice['invoice_info'])
-    
-    elif invoice_type == "invoice 3":
-        valid_invoice = validate_invoice_3(invoice_data=invoice_info, config=config)
-        full_invoice = Invoice3(invoice_info=valid_invoice['invoice_info'])
+    invoice_types = {
+        "invoice 1": (validate_invoice_1, Invoice1),
+        "invoice 2": (validate_invoice_2, Invoice2),
+        "invoice 3": (validate_invoice_3, Invoice3)
+    }
 
-    full_invoice_dict = full_invoice.model_dump(exclude_unset=False)
-    return full_invoice_dict
+    if invoice_type not in invoice_types:
+        raise ValueError(f"Invalid invoice type: {invoice_type}")
+
+    validate_func, invoice_class = invoice_types[invoice_type]
+
+    valid_invoice = validate_func(invoice_data=invoice_info_copy, config=config)
+    full_invoice = invoice_class(invoice_info=valid_invoice['invoice_info'])
+    
+    return full_invoice.model_dump(exclude_unset=False)
 
 
 if __name__ == "__main__":