If you don't sign the notice of unqualified probation period, you should also write the words of refusal. According to the display of relevant public information, in order to ensure the effectiveness and record of the notice, the company can prove that the employee has received the notice and knows the contents of the notice, but refuses to sign it for some reason to avoid unnecessary disputes between the two parties. In order to ensure fairness and justice, the company should also let employees know that they have the right to express their opinions or objections to the notice. If the employee does not sign or refuses to sign the notice, the company should record it and back it up in the employee file for future use.