The sum of the issued check has been doubled

When a member borrows a loan

The amount specified in the promissory note doubles.

This requirement is described in paragraph 2.5. of The Rules.

2.5 The obligatory condition for concluding the Loan Agreement between the parties is that a Debtor, as a guarantee of fulfillment of their liabilities, should present to the Service a promissory note in the Paymer format that guarantees repayment of an amount equal to double the loan amount for the whole period of the Loan use. By presenting an offer to their Correspondent the customer fully agrees that the Service transfers the equivalent amount to another party in case the Debtor does not fulfill their obligations.

This is necessary to make the repaying of the loan at the expense of other limits opened to the debtor possible.