The right to terminate labor contract based on situations being unfit for morals and good will presented in article 24 and 25 of the Labor Law numbered 4857 and vested to employer cannot be used later than 6 working days after the employer learns that the employee acts against morals and good will. Also he/she cannot use this right 1 year later after the fact in any case.
However, if the employee derives pecuniary advantage, 1-year period will not be taken into consideration. Because of these situations; the right to indemnity of an employer or an employee, who terminates his/her labor contract within the period stated above, is reserved.
Source: Labor Law