No sreeni Internal control is system of controls in your office to check the accuracy. for examlpe one document is prepared by Junior accountant it should be checked by the senior Accountant than it goes to manager and than further it will go to Cheif means wok of one person is checked by another to avoid the errors or mkistakes. While internal audit is a kind of audit conducted with in the organization to check finacial statements are prepared according to the principles of accounting which ever is applicable to your country.