A person who has been authorized to perform certain activities on your behalf, e.g. submit applications and documents, receive correspondence, etc. The scope of the authorization depends on you. The proxy will be able to act on your behalf only after submitting oryginalu powers of attorney in the office. stamp duty for a power of attorney is PLN 17, it does not have to be paid, among others, when the proxy is spouse, ascendants, descendants or siblings.
