Which feature is found on Oregon IDs to prevent tampering?

The feature that is found on Oregon IDs to prevent tampering and enhance security is a watermark that glows under black light. This security measure is designed to be difficult to replicate, often making it easier for officials to verify the authenticity of an ID. The watermark is typically subtle and can only be seen when the ID is illuminated with ultraviolet light, making it a reliable method for distinguishing between genuine and counterfeit identification.

The presence of this security feature adds an additional layer of protection against forgery and helps ensure that IDs are not easily altered or faked. This capability is essential for preventing fraudulent activities, particularly in contexts where age verification is critical, such as in alcohol and cannabis service establishments.

Other features, like bar-coded information on the back or a digital signature on the front, do serve important purposes, such as storing personal details and providing a quick reference for electronic verification. However, they do not specifically serve the same purpose of immediate visual tamper-evidence that the watermark does in conjunction with black light. Visible physical descriptions, while important for identification, do not inherently serve as tamper-proof measures either, focusing instead on helping identify the individual rather than securing the document itself.