Using debt instrument and security agreements can limit your ability to secure additional financing for your business, especially if the lender files a UCC-1. A debt certificate is legally valid, in which the borrower of funds promises to repay it under certain conditions. It usually indicates the date on which the payment is due and contains specific conditions that influence the refund, such as for example. B the interest rate. A debt certificate can be either secure or unsecured. When a certain amount of money is borrowed by a person, he must make a promise to repay it within a specified period. A guarantee contract and a debt certificate are used to formalize a loan and agree in writing on the terms of its repayment. .