I didn't get the social # of a worker(my father) and he won't give it to me. Do I fill out the 1099misc for him? What happens when there is no social on the form?

The person happens to be my father but he won't give me his social security number and I am trying to file taxes correctly for my small business. Do I still file a 1099misc with the IRS for him? And what happens when they see there is no social number on it?