Waiver and waver are homophones, but they mean very different things. I often find that waiver is used when the writer actually means waver – I presume the mistake is made because the writer has the ay sound in mind.
- the act or an instance of giving up a claim or right
- a document recording the giving up of a claim or right
- to hesitate between possibilities; to be indecisive
- to swing from one thing to another
- to become unsteady; to falter; to become weaker
- to move back and forth or one way and another; to quiver or flicker
My tip: try to associate waiver with the giving up of a claim. It should be fairly easy to remember that waver is the spelling for everything else.