The paper considers the sense of using the blank promissory note as a means of securing of consumer loan, while also questioning its purpose luce chandelier as means of security.The initial hypothesis is the legal absurdity of the same person being a debtor under the two different legal basis -promissory note and consumer loan.The same person is the guarantor for themselves - by signing the blank note they guarantee the performance of the consumer loan contract.That arrangement seems tautological having in mind that the same person, through two sequal eclipse 5 battery legal basis but with the same property, guarantees the performance of the underlying contract manifested in a consumer loan.This is the core proof of the absurdity of using the blank promissory note as collateral security.