The parties to a Power of Attorney are required to sign (execute) only one copy. However, if the transaction will be closed in escrow, one original and three copies are typically forwarded to escrow.  In addition, Financial institutions generally require an original or a certified copy before allowing an Attorney-in-Fact to complete business on the Principal's behalf. In addition, banks frequently provide customers with their own Power of Attorney forms. The signatures on the Power of Attorney must be witnessed by a Notary Public.