- Getting in touch with his doctor
You may have to get your dad to specifically do this, unless the doctors know that he is unable to do it alone. You will need to get a written letter from his doctor and send it to his place of employment to prove that he is genuinely sick. If you, for some reason, cannot get in touch with his doctors, you could try another option. Remember that you will probably need him present when you go and pick up the sick note from the doctor.
- Write an emergency one yourself
If you, for some reason, cannot get in touch with the doctors and desperately need to send in a sick note for your dad, you could write one yourself to tell them of his current illness and explain your circumstances. If he is generally a trustworthy character at his place of work, this should be fine. Otherwise, you could perhaps ask another professional to write a letter to explain that he is actually unwell. You could just promise a letter from the doctors in time. This should be sufficient to ensure that he still gets his pay.
- Visit the hospital or out of hours doctors
If you are really desperate to get hold of an emergency leave letter for your father, you may need to take him to an out of hours doctors for an appointment to obtain it. Alternatively, you could show the place where he works any correspondence from the hospital or doctors from appointments, even prescriptions could get you off the hook.