Pretty much anyone other than the people below may witness the signing of your power of attorney. Here is a list of people who cannot be a witness:
• The grantor (person giving the POA)
• The attorney (person assigned the POA)
• Spouse or partner of either the grantor or attorney
• Children of the grantor or anyone who the grantor has the intention of treating as their child
• Anyone under the age of 18
• Anyone mentally incapable of performing the requests of the POA
Your friends, neighbours, and colleagues are usually good picks for witnessing.