Waiver

A waiver is the voluntary relinquishment or surrender of some known right or privilege.

While a waiver is often in writing, sometimes a person's actions can act as a waiver. An example of a written waiver is a disclaimer, which becomes a waiver when accepted. Other names for waivers are exculpatory clauses, releases, or hold harmless clauses.

Sometimes the elements of ""voluntary"" and "known" are established by a legal fiction. In this case, one is presumed to know one's rights and that those rights are voluntarily relinquished if not asserted at the time.

In civil procedure, certain arguments must be raised in the first objection that a party submits to the court, or else they will be deemed waived.