Agree to assist your family member only at her request. Continual attempts to coerce her into signing the power of attorney may not be a good idea, especially if there are family members involved who feel you exerted undue influence upon her due to her disability for your own benefit. A power of attorney, especially a general power of attorney with a broad range of powers, should be willingly entered into by the principal after much forethought.
Contact or have the principal contact an attorney to prepare the power of attorney. Even though you may be able to prepare the document yourself, an attorney will be a credible witness as to the mental clarity of the disabled person at the time of signing. The attorney may choose to question the principal in a consultation to determine that she is not mentally disabled or impaired prior to the execution of the document.
Acquire and begin using the properly signed and notarized power of attorney. Provide copies, if required, to the principal’s bank or other financial institutions as well as anyone who may be called upon to rely on the power of attorney for future transactions.