In an acknowledgement of debt, can the creditor require the repayment prematurely?

The creditor cannot require payment prematurely, but what was beforehand executed is considered as repaid, unless otherwise stipulated. In other words, the term of the loan benefits to the borrower. On the other hand the borrower can waive it, without the consent of the creditor.

However, the borrower loses the benefit of the term if he fails to meet his obligations towards the creditor. He also loses the benefit of the term if he becomes insolvent, is declared bankrupt or decreases, by his act and without the consent of the creditor, the security which he would have been able to grant him.