The Post: 8 Things You Should Never Do at an Airport Security Checkpoint first appeared on Crafting Your Home
Airport security is stressful enough without accidentally creating your own delay. The good news is that many checkpoint headaches come down to a handful of avoidable mistakes.
TSA procedures can vary by airport, screening lane, and equipment, so the smartest strategy is to arrive prepared and follow instructions rather than relying on what happened on your last trip.
Here are eight things travelers should avoid doing at a U.S. airport security checkpoint.
1. Never Show Up Without Acceptable Identification
Getting to the front of the security line is a bad time to discover that your identification is no longer sufficient.
Since May 7, 2025, state-issued driver’s licenses and identification cards that are not REAL ID compliant are no longer accepted as standard identification at TSA checkpoints.
A passport is one acceptable alternative.
Travelers who arrive without acceptable identification may be able to use TSA Confirmed, an identity-verification service introduced February 1, 2026.
It costs $45, and it should not be treated as a guaranteed shortcut or a reason to leave your regular identification at home.
The easier move is simple: check your ID before leaving for the airport.
2. Never Toss an Oversized Toiletry Into Your Carry-On
That nearly empty bottle of shampoo can still cause trouble if the container itself is too large.
For ordinary liquids, aerosols, gels, creams, and pastes in carry-on luggage, TSA’s standard limit is 3.4 ounces, or 100 milliliters, per container. Those containers must fit inside one quart-size bag per passenger.
The key point is that TSA looks at the container size, not the amount remaining inside. A six-ounce lotion bottle with only a small amount left is still a six-ounce container.
When allowed, put larger toiletries in checked baggage.
3. Never Assume Spreadable Food Counts as a Solid
A sandwich may be straightforward, but a jar of peanut butter is another story.
TSA treats foods you can pour or spread differently from ordinary solid snacks.
Peanut butter carried through security is subject to the 3.4-ounce limit, and products such as preserves and maple syrup can also fall under the liquids rule.
That detail can be easy to miss when packing snacks, gifts, or specialty foods from home.
Before putting a questionable food item into your carry-on, ask yourself whether it behaves more like a liquid, gel, or spread than a solid. That quick check could save you from repacking at the checkpoint.
4. Never Bring a Firearm or Other Prohibited Item in Your Carry-On
This packing mistake can have serious consequences.
Firearms and ammunition are prohibited in carry-on baggage. To transport a firearm by air, it must be unloaded, secured in a locked, hard-sided container, checked with the airline, and declared at the ticket counter.
TSA warns that bringing a firearm to a security checkpoint can result in civil penalties and potentially an arrest.
The same basic lesson applies to any item you are unsure about: check TSA’s rules before packing rather than assuming it will be allowed through the checkpoint.
Related: The 5 Most Popular Firearms in History
5. Never Leave Your Phone, Keys, or Wallet in Your Pockets
Waiting until the last second to empty your pockets can slow you down and everyone behind you.
Before entering the scanner, remove items such as your phone, wallet, and keys. TSA also recommends placing small valuables inside your carry-on instead of leaving them loose in a screening bin.
That approach has two advantages: it makes the screening process more orderly, and it reduces the chance that you will walk away without something important.
A little preparation while you are still in line can make the actual screening process much smoother.
6. Never Assume Every Security Lane Follows the Same Routine
Airport screening technology is not identical everywhere.
Some TSA lanes equipped with computed tomography, or CT, scanners let passengers leave electronics and travel-size liquids in their bags.
Other lanes may still require travelers to remove certain items.
That means the routine you followed at one airport may not apply at the next one or even at another checkpoint in the same airport.
Instead of automatically pulling everything out of your bag, listen to the TSA officers working your lane and follow their instructions.
The same goes for shoes.
TSA announced in July 2025 that passengers may keep their shoes on at domestic airport security checkpoints, so blanket advice telling every traveler to remove them is outdated. Travelers should still follow instructions given during screening.
7. Never Keep Exempt Baby-Care or Medical Liquids Hidden in Your Bag
Not every liquid over 3.4 ounces is prohibited. Breast milk, formula, toddler drinks, and baby food can exceed the ordinary liquid limit and do not have to fit inside the standard quart-size bag. Declare these items to the TSA officer at the beginning of screening and remove them for separate inspection.
Additional screening may be required. The key mistake to avoid is assuming that anything larger than 3.4 ounces must be surrendered. TSA provides specific exceptions, and travelers should identify qualifying items rather than burying them in a packed carry-on.
8. Never Tightly Wrap a Gift Before Going Through Security
Beautiful wrapping can quickly become wasted effort if TSA needs to inspect what is underneath it.
Wrapped gifts are allowed, but if an item triggers an alarm or requires additional inspection, officers may need to open the package. That could mean torn paper, crushed bows, and an unexpected delay.
A more checkpoint-friendly approach is to use a gift bag or a box with a removable lid. The present can still look festive while remaining easy to inspect if necessary.
This trick is especially useful during holiday travel, when luggage may already be packed with gifts and extra belongings.
Airport security rules do not have to turn your trip into an obstacle course. Pack carefully, keep an eye on current TSA procedures, and follow the instructions at the checkpoint you are actually using.
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