WAIVER

The act of waiving, or not insisting on, some right, claim, or privilege.

A legal document removing some requirement, such as waiving a right (giving it up) or a waiver of liability (agreeing to hold someone blameless).

"I had to sign a waiver when I went skydiving, agreeing not to sue even if something went wrong."

Something that releases a person from a requirement.

"I needed a waiver from the department head to take the course because I didn't technically have the prerequisite courses."

To waive (to relinquish, to forego).