In order to satisfy the requirement of negotiability that payment be at a time certain or on demand, acceleration of payment is not allowable.

Acceleration

A provision in a contract that allows a lender to demand immediate payment of the entire outstanding balance if certain conditions are not met.

Payment

The transfer of money or its equivalent in exchange for goods, services, or to settle a debt.

Time Certain

A specific point in time agreed upon at which an event must occur or a condition must be met.