The risks of an IOU without the borrower's signature are as follows: IOU has no legal effect. In the case that the borrower refuses to repay the loan, even if the lender takes the loan as evidence, the court can't determine the fact that the loan is between the two parties without confirming that it is not signed by the borrower.

legal ground

Article 667 of the Civil Code, which came into force according to 202 1 1.

A loan contract is a contract in which the borrower borrows money from the lender, repays the loan at maturity and pays interest.

Article 668 of the Civil Code

A loan contract shall be in written form, unless otherwise agreed between natural persons.

The contents of a loan contract generally include terms such as loan type, currency, purpose, amount, interest rate, term and repayment method.