If the TSA identifies a prohibited item in your bag, the outcome depends on the nature of the item. For standard "voluntarily surrendered" items like oversized liquids or small tools, you are typically given four options: surrender the item to the TSA (where it is usually disposed of or auctioned), take the item back to your vehicle or give it to a non-traveling friend, check the item in a checked bag (if the airline allows it), or mail the item to yourself if the airport has a mailing kiosk. However, if the item is illegal or highly dangerous, such as an undeclared firearm or explosives, the TSA will contact local law enforcement to handle the situation, which can lead to criminal charges. Beyond legal action, the TSA can impose civil penalties—fines that can exceed $15,000 for serious violations like bringing a loaded gun to a checkpoint. Furthermore, a major violation often results in the immediate and permanent loss of your TSA PreCheck eligibility.