單身老貓 and other lawyers, could you please help?

A friend of mine asked me to translate a document from Chinese to English for her, but I am at lost with this kind of document. I would really appreciate if any of you could help:

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委托書


我叫XX，現居住在美國。我在XX省XX市XX路擁有一套麵積為XX的住宅，現由我母親XXX，父親XX居住。我委托他倆全權處理該住宅的一切事宜（包括出售，出租, 拆遷）。特此為證。


委托人　XX

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Also, is 委托書 same as "power of attorney"?

Thanks so much in advance!