It is a written document signed by a person giving another person the power to act on behalf of the person granting the power in particular activities, e.g. filing applications, documents, collecting personal mail etc. The person receiving a power of attorney is attorney-in-fact for the person giving the power. The scope of a power of attorney depends on your personal preference or trust. The attorney-in-fact will be able to act on your behalf after submitting a power of attorney to the office. Power of attorney is the subject of the stamp duty (17PLN).