I have a client who had money transferred out of her account over a month's time over $100,000. It went to a sports betting over a period of time. My client never checked her account until she needed it to pay the IRS for a sale of property. The Credit Union only reimbursed them $50,000. The police are investigating the theft. She doesn't think she will get anything other money returned.

Is this a casualty loss? Do I need to fill out form 4684? I have never had a loss of money.

Thanks!