The "his/her agent" should be the default verbiage when the property is in PA and if not in PA the "attorney-in-fact" verbiage would default.  The reason for using "agent" is because the power of attorney statutes in PA use "agent" instead of attorney-in-fact.  20 Pa. Stat. § 5601(f) states: As used in this chapter (Chapter 56. Powers of Attorney), the term "agent" means a person designated by a principal in a power of attorney to act on behalf of that principal.