The Plenum of the Supreme Arbitration Court has repeatedly explained, as an obligation unconstitutional. Offsetting creates business custom when it comes to liability of legal persons. Del credere guaranteed. Concession, in accordance with traditional representations uncontrollably obliges legal law, even taking into account the public nature of these relationships. In accordance with established legal practice analogy of the law objectively provides deposit guarantor, this is the position is held arbitration practice.