Possible Clues:

• What a soldier wears that has a serial no
• Collar accessory for Fido
• Med-alert bracelet, e.g.
• Soldier's neckwear
• Convention label
• What a sec. guard might check
• Accessory to a case
• "Hello! I'm ..." badge
• One might dangle from your neck
• Item on a dog collar or suitcase