A Power of Attorney can take effect as soon as two people witness the notarization of the document. Some people may choose a “springing” POA. This does not take effect until a specific triggering event happens, such your incapacity. Be cautious with a springing POA. There are several problems with springing POA. First, the agent needs an affidavit showing the triggering event has occurred before the agent can use the POA. Some banks are also reluctant to recognize a “springing” POA document.