A durable financial power of attorney is a legal document that appoints an “agent” or “attorney-in-fact” (of your choosing) to step in to handle your financial affairs should you be unable to due to illness, disability or if you are unable to be present to sign a document. A durable power of attorney become effective when the document is signed and remains in effect if you become ill or disabled and cannot act personally. A springing power of attorney comes into effect only if you become incapacitated.