How the mechanism works
An auto-renewal clause, sometimes called an evergreen clause, says that when a contract reaches the end of its term it continues automatically for a further period unless one party gives notice. Two variables define it: the length of the renewal term and the length of the notice window before it. Reading one without the other tells you almost nothing about how much control you actually have.
The mechanism itself is sensible. Most business relationships do continue, and requiring an active decision every year creates administrative work and the risk of accidental interruption. What causes trouble is the combination of a long notice window, an open renewal price and a contract that nobody owns.
