How can i give my loved one legal power if i have early alzheimer's disease?

Power of attorney: Most banks have documents for poa; the document gives an individual the authority to make financial decisions. It needs to be notarized.

Depends on PA's laws: This question likely is best directed to an elder law attorney in your state. In general, most states have legal ways for you to grant financial and medical decision making powers, or pwer of attorney, to someone else if you are no longer able to make decisions for yourself. Sometimes it is necessary to actually go to court and have a judge appoint a legal guardian.