TY JOUR TI «Unrecorded» rules for bank guarantees, or norms, that cannot be read in § 6 of chapter 23 of the civil code of the Russian Federation: practical aspects KW bank guarantee KW claim for payment under bank guarantee KW unjust enrichment KW responsibility of the guarantor KW beneficiary KW principal JO Journal of Legal Studies AU Pyhtin, S.V. PY 2021 IS 6 PB INFRA-M Academic Publishing LLC.