Guarantor issues

Hi, my father agreed to be my guarantor for my accommodation however the email he received stated he needed a form of ID (passport, driver's license, national ID card). He has an invalid passport (expired) and we cannot find his driver's license/national id card. We have proof of the address but no id proof. The email said this has to be done in a weeks time and we only have 2 days left. Is there any other way to prove the ID? Maybe birth certificate? This is a real issue what can we do if we have no ID proof?