Which of the following is NOT a valid form of consent for tattooing?

Consent for tattooing is a crucial aspect of the practice, ensuring that clients are informed and agree to the procedure being performed. A valid form of consent should ideally include clear documentation that outlines the client's understanding and agreement to the tattooing process, as well as any potential risks involved.

A written agreement is a standard practice in the tattoo industry, providing both the artist and the client with a tangible record of consent. Similarly, notarized consent adds an additional layer of verification, which can be important in case of disputes. Electronic consent is increasingly recognized in many fields, including tattooing, as long as it adheres to legal guidelines and effectively captures the client's agreement.

In contrast, a verbal agreement without documentation lacks the necessary proof of consent. While communication is essential, relying solely on verbal understanding does not provide any formal evidence that the client has agreed to the procedure. This makes it the least reliable form of consent and, therefore, not valid as a standalone document in the context of tattooing where legal and ethical standards must be met.