EN
Legal security, as a general systemic principle closely related to the principle of legal certainty of particular importance for the entire system, is reflected in the Polish law as the principle of security of legal transactions. The article features an attempt to characterize “legal transactions” in writing, focusing in particular on the multidimensional nature of this term. An in-depth analysis of the term “legal transactions” in writing is necessary in order to determine the boundaries of security of legal transactions, which crossing by the notary public (not only by his activity as part of duties of a notary, but also negligence - refusal to perform a requested notarial activity) can result in liability.