I have POA, can I remove someone from my mother's house title?

Depending on whether your mom had a medical diagnosis in her records that preceded the refinancing, I would invest in a consult with either a real estate attorney or certified elder law attorney. I don't think you can just remove a co-signer's name unless there is some sort of financial or legal resolution, and even if you could, does your PoA give you this sort of authority? Has the aunt been "helping" by paying the mortgage company directly or giving cash to your mom? You will need to know how this impacts your mom's ability to qualify for Medicaid as well.

I would certainly seek legal advice about this and not rely on advice from us well-meaning folks on the Forum. Your mother refinanced her house and changed the title after her Alzhemer's diagnosis. This should not have been possible if she had been declared incompetent, but apparently those involved in the transaction were either unaware of her condition, actively concealed it, or were ignorant of the fact that she was not competent for this kind of transaction. The first thing to find out, which is information a lawyer would need, is how the ownership is titled. Is it joint or tenants in common? If tenants in common, each owns their own share of the property, so to speak. Person #1 can force the sale or, if person #2 wishes to continue to own the property, person #1 can request that person #2 buy out person #1's share. But it does sound as though your aunt was kind enough to provide care to your mom at home. I don't see why there would be a problem with your aunt wanting to sell the house since your mom is no longer living there and it sounds like she's unlikely to return. Your mom would get her share of the proceeds, and you could use that share, as her POA, to help provide for your mom's care. You should check the wording of your POA to make sure it allows you the right to sell real estate on your mother's behalf.

You really need to talk to a real estate attorney--it matters how the home is titled.