After carefully checking the power of attorney to make sure that it accurately reflects his or her intentions, the donor should sign it before a person authorised by law to take affidavit. This means a lawyer, a justice of the peace, a proclaimed bank manager or proclaimed police officer.

The donee of an enduring power of attorney must sign the form to show that she or he agrees to accept the responsibility of being a donee. This does not have to be done at the same time the donor signs, nor must it be done before a witness. The wording used for the acceptance must comply with the Powers of Attorney and Agency Act 1984 Schedule 2. This is the wording on the official 'Enduring Power of Attorney' form.