One day catering liability insurance and licensure

Hello, I am gettin married in Oct. of this year. My father is a self taught chef, and has worked his way up in the culinary field. He will be catering my wedding. The place that im looking at has no problem with that as long as he has his liability insurance and licensure. My father is currently employed at a private club and does not have the required documents of his own. How can we obtain such documents for just the wedding day? ANY guidance would be greatly appreciated, thanks! -Stressed out bride!