Ключевые слова: advantageous, agreement, authentication, authenticity, beneficial, binding, compulsory, consequential, contract, crucial, deed, effective, enforceable, essential, genuine, impactful, important, influential, justice, law, legal, legality, meaningful, necessary, notarized document, obligatory, official, paper, powerful, protection, real, required, security, signature, significant, stamp, substantial, table, trust, useful, valid, validation, verification, vital, wood,