§ 8126 Lien Waiver Void Without Payment

• •You can't just say or write that you give up your right to get paid for work you did—it doesn’t count unless you follow the rules.
• •The only way to really give up your right to payment is if you sign a special form that follows the law.
• •If you’ve already been paid in full for the work, then you can’t ask for more money later.

A contractor fixes your roof but asks you to sign a paper saying you won’t pay them, even though they haven’t been paid yet.

That paper doesn’t mean anything unless the contractor uses the special form required by law or you’ve already paid them in full. They can still ask for their money.