My elderly father had allowed an employee to stay in his carport apartment free of charge with no written agreement. She has since started a relationship with his son and no longer lives in the apartment. She will not give up the key to the lock and is the only one with the key to the apartment. I wish to now issue her a notice to vacate. If need me possible eviction notice. How do I go about it and do I have the law on my side simply because I wish to have my apartment returned to me along with the key to gain access once again?