We analyzed liberality, special institution of civil law substantially in two particular aspects: legal document formation legal act unilaterally and bilaterally band. Every human life is a complex and irreversible phenomenon, which they flow, limited in time, involve many connections with other beings, interfering various rights and obligations, concessions and compromises in the most varied forms. Within this complex phenomenon are inherent and legal operations are intertwined in the thread everyday life, day after day. Legal acts are governed by common rules, essential and generally applicable, on unilateral expression of will, the conditions of formation of the agreement will, in respect of conditions of life imperative, the form you need to put the act . Human freedom is expressed through law. But what is really important, lies in the fact that human beings can not be taken away freedom of choice to discern between good and evil, between normal and abnormal. Each person in relation to choice of law can have consequences.