I use to work in a private practice gym as a physio. Before I started I needed to fill in a form to get a provider number so I could treat Medicare patients referred to me from the GP. In the form, it asked for bank account details and I put mine. So every time I treated a Medicare patient referred to me, I claimed it under my provider number and the funds went into my account. I worked there for a year and resigned last month because I was fed up with him. My ex-boss today called me saying he suspects that Medicare funds have been going into my account (he went through my pigeon hole on my last day and saw a copy of a claimant form he said) and that I should of put in his bank details when applying for the provider number at the start (he never mentioned it to me when I was applying for it) and is demanding I return the money or he is going to get the police involved to get a search warrant to my bank account and I could get a criminal record. I called up Medicare and they said I had done nothing wrong by Medicare but this was more of a civil case. I feel as though that was his own fault for not informing me to put in his bank account details when applying for my provider number (or he should have filled out the form himself) and that I shouldn't have to pay any money back due to his mistakes. Mind you, he has been slandering my name to the clients since my departure saying I 'stole' money from him (I know because I have a good relationship with all of the clients and they called me telling me about it). What are your thoughts on this and also about his threat of potentially getting a criminal record? It's not like I intentionally did anything wrong.