You must be vary carefull with bankruptcy. If your tenant has filed you should contact an attorney immediately. An Attorney can help you but it is usually going to be expensive and take quite some time. You can still evict them but you must first lift the automatic stay in the bankruptcy court or face sanctions. Please see an attorney and a good one this is not for the novice. Landlords loss a lot of money from tenants. I always tell my landlords this is a business and should be treated as one.