California Proof of Execution by Subscribing Witness We're sorry. California Proof of Execution by Subscribing Witness is not available for use by Notaries in Virginia. If the chosen state is incorrect, you may change your state at the top right of the page. Membership in the National Notary Association is the SINGLE MOST IMPORTANT ACTION a Notary can take to ensure quality performance and prevent workplace liability. NNA Membership Guides Your SuccessJoin Now