diff --git a/argenta/router/entity.py b/argenta/router/entity.py
index a2b4ede..802de1a 100644
--- a/argenta/router/entity.py
+++ b/argenta/router/entity.py
@@ -5,7 +5,10 @@ from ..command.input_comand.entity import InputCommand
 from ..command.input_comand.exceptions import InvalidInputFlagException
 from ..command.params.flag.flags_group.entity import FlagsGroup
 from ..router.exceptions import (UnknownCommandHandlerHasAlreadyBeenCreatedException,
-                                 RepeatedCommandException, RepeatedFlagNameException)
+                                 RepeatedCommandException, RepeatedFlagNameException,
+                                 CurrentCommandDoesNotProcessFlagsException,
+                                 TooManyTransferredArgsException,
+                                 RequiredArgumentNotPassedException)
 
 
 class Router:
@@ -27,6 +30,7 @@ class Router:
         self._validate_command(command)
 
         def command_decorator(func):
+            Router._validate_func_args(command, func)
             self._command_entities.append({'handler_func': func,
                                            'command': command})
             def wrapper(*args, **kwargs):
@@ -51,16 +55,20 @@ class Router:
         input_command_name: str = input_command.get_string_entity()
         for command_entity in self._command_entities:
             if input_command_name.lower() == command_entity['command'].get_string_entity().lower():
-                if input_command_name == command_entity['command'].get_string_entity():
+                if command_entity['command'].get_flags():
                     if input_command.get_input_flags():
                         for flag in input_command.get_input_flags():
                             is_valid = command_entity['command'].validate_input_flag(flag)
                             if not is_valid:
                                 raise InvalidInputFlagException(flag)
-                        return command_entity['handler_func'](input_command.get_input_flags())
+                        return command_entity['handler_func'](args=input_command.get_input_flags())
                     else:
-                        print(getfullargspec(command_entity['handler_func']))
-                        return command_entity['handler_func'](None)
+                        return command_entity['handler_func'](args=FlagsGroup(None))
+                else:
+                    if input_command.get_input_flags():
+                        raise CurrentCommandDoesNotProcessFlagsException()
+                    else:
+                        return command_entity['handler_func']()
 
 
     def get_unknown_command_func(self):
@@ -86,6 +94,20 @@ class Router:
                 raise RepeatedFlagNameException()
 
 
+    @staticmethod
+    def _validate_func_args(command: Command, func: Callable):
+        registered_args = command.get_flags()
+        transferred_args = getfullargspec(func).args
+        if registered_args and transferred_args:
+           if len(transferred_args) != 1:
+                raise TooManyTransferredArgsException()
+        elif registered_args and not transferred_args:
+            raise RequiredArgumentNotPassedException()
+        elif not registered_args and transferred_args:
+            raise TooManyTransferredArgsException()
+
+
+
     def set_router_as_main(self):
         if self.name == 'subordinate':
             self.name = 'main'
diff --git a/argenta/router/exceptions.py b/argenta/router/exceptions.py
index 7cc3868..62f5157 100644
--- a/argenta/router/exceptions.py
+++ b/argenta/router/exceptions.py
@@ -16,3 +16,18 @@ class RepeatedCommandException(Exception):
 class RepeatedFlagNameException(Exception):
     def __str__(self):
         return "Repeated flag name in register command"
+
+
+class CurrentCommandDoesNotProcessFlagsException(Exception):
+    def __str__(self):
+        return "Current command does not process flags"
+
+
+class TooManyTransferredArgsException(Exception):
+    def __str__(self):
+        return "Too many transferred arguments"
+
+
+class RequiredArgumentNotPassedException(Exception):
+    def __str__(self):
+        return "Required argument not passed"
diff --git a/tests/mock_app/handlers/routers.py b/tests/mock_app/handlers/routers.py
index 522152d..cfd4100 100644
--- a/tests/mock_app/handlers/routers.py
+++ b/tests/mock_app/handlers/routers.py
@@ -20,12 +20,12 @@ flagi = FlagsGroup(flags=[
 ])
 
 
-@work_router.command(Command(command='0', description='Get Help', flags=flagi))
-def command_help(args: FlagsGroup | None):
+@work_router.command(Command(command='0', description='Get Help'))
+def command_help():
     print('Help command')
-    flags = args.get_flags()
+    '''flags = args.get_flags()
     for flag in flags:
-        print(f'name: "{flag.get_string_entity()}", value: "{flag.get_value()}"')
+        print(f'name: "{flag.get_string_entity()}", value: "{flag.get_value()}"')'''
     #help_command()