In 2015 my brother opened up an online bank account that was in my mom's name where I'm the beneficiary. And started sending money from one bank account to another without my mom's permission she contacted the bank and had them delete the online account since she didn't give him permission in 2019 he got guardianship of my mom and February of 2020 went and took all the money out of the account that I was the beneficiary, can he legally do that
For instance, I was POA for my brother and his Trustee as well. He had several accounts that were POD to his ex partner. They were in CDs. When those CDs came due I could move and rename those accounts any way I wished to. For instance I could have taken an CD that came due that was in the name "Alva's Brother" POD to "Alva's brother's ex" and could have collected the money, putting it in his Trust for his ongoing care. Or I could have made a new CD that was in the name of "Alva's Brother", POD to "Alva herself".
As it stands, I not only kept the money he wished in the CD, pod to his ex, but I added to it when he sold his last little home, as per his request.
While the mother is living your brother may decide that certain accounts need to be transferred to other investments and if his POA or guardianship is written so that he has a right to do that, he can do it.
He may do this because your mother now needs this money for her care.
He may do it for other nefarious reasons.
But sadly it is likely true that he can do it.
You may want to make an appointment with the bank manager or with an attorney with this question, but that's about all you can do. lA guardian has great powers.