Stolen check was cashed. Legal action needed?

I lost a signed paycheck. It was cashed by whoever found it at some store. The store tried to cash it at the bank and was rejected as it had been canceled. The people got in touch with my job and now they want their money back. Apparently, they say they have a copy of my id (obviously not my actual id) when i went to cash it. Now that me and my boss refused to give them any money, they say they'll start taking legal action. So I just wonder if me or where i work could possibly be summoned to court or something like that over this matter? The only info they have of me is my name and a signed check, but they do have my work information on the check (address and phone number).