nameplate

Example:The gatekeeper attached an identifier plate to the mail delivery driver.

Definition:A small plate that serves as an identifier, often containing text or symbols.

Example:The lab technician applied a label to the test tube with the patient's name.

Definition:A piece of paper or card attached to an object for identification or information, especially in a factory or office.

Example:Each file folder had a tag with the project name and the year.

Definition:A small piece of cloth, plastic, or metal marked with a name, number, or other identifying information, especially used as a label or marker.