An Attorney-In-Fact can be very helpful when the person they are representing is unable to act on their own behalf. For example, if someone is out of town and needs to sell their house, they might designate their attorney-in-fact to handle the sale. The attorney-in-fact would have the legal authority to sign documents and take other actions necessary to complete the sale.An important thing for people to remember is that an attorney-in fact can only act within the scope of their authority. If someone wants their attorney- in -fact to do something that goes beyond what was authorized, they need to get a new power of Attorney document signed.