Ex-wife moved in 3 years ago but doesn't contribute towards bills

FlorayG

As a lodger, she has very few rights. You can just evict her if you think that is really the best course for your father. Wait until she goes out and just change all the locks. That's perfectly legal with a lodger ( NOT with a tenant!) and ask her what you should do with her belongings.
YOU can do this because you have POA and that requires you to take actions that are in the best interests of your father; clearly if she is costing him money then she needs to go

elsien

It really does make a difference as to what his understanding was when she moved in. He may no longer be able to understand, but if at the time because three years is a long time for someone with dementia, He accepted her moving in and not paying anything that’s a pretty fair indication of his wishes Which would form a large part of any best interest decision now.
So what was the situation back then when she first came and was it intended to be long-term?

silvercar

I’d make a list of all the extra costs incurred and all the savings made by her being there.

There’s the council tax, though his dementia means he is discounted and so the property get a single person discount.

On the positives, would you Dad need a live in carer if she wasn’t there? At what cost? Would you need to put more support in place if she wasn’t there? Worst case, would your Dad need to move to a care home? Having another person around, even if they don’t contribute, can make a world of a difference.