Depending on the degree of Mom's mental issue - it may be too late for a POA. Look on this page upper right under "Money and Legal" then POA & Guardianship. Your question is covered in detail there. Good luck.
In order to put a Durable Power of Attorney in effect, a Dr. Needs to deem her incompetent to make her own decisions. A court can too, but its more complicated.
Look on this page upper right under "Money and Legal" then POA & Guardianship. Your question is covered in detail there. Good luck.