Should You Lock a Checked Bag?

A lock helps a little, but a TSA-recognised one is the safer choice, and valuables belong in your carry-on.

Published October 27, 2026 · 3 min read · Topic: Travel & Airline Rules · Travel rules

Typical situation

You are about to check a bag for the first time in a while and you are wondering whether to lock it, and what happens if TSA wants to look inside.

Main answer · berabags Editorial Team · Rules view

A lock is optional, and it helps only a little. If you use one, use a TSA-recognised lock. TSA may physically inspect checked baggage. If officers need to open a bag and cannot open the lock with their master keys, TSA says they may have to cut or remove it.

What an inspection looks like

TSA places a notice of inspection inside a checked bag that officers have opened. If you find one, you know your bag was opened for security reasons. If something is missing or damaged, report it to the airline straight away.

What a TSA-recognised lock does

Officers have keys that can open the lock without cutting it.
It does not stop an officer from cutting it if it will not open, and it does not guarantee a bag will not be opened.
Many bags have built-in locks. Check that the model you use is recognised, since unmarked locks are not.

What actually protects your belongings

Keep valuables, documents, medicine, electronics and anything fragile in your carry-on.
Close the zippers fully and keep the bag from bulging.
Put your name and phone number inside and outside the bag.
Take a photo of the bag and its contents before you check it.

Where this answer stops

This is general guidance based on US TSA information. Other countries have different rules, and some airports use their own security procedures. A lock does not change an airline’s responsibility for lost or damaged baggage.

Sources and further reading

Three more perspectives

berabags Editorial Team · Selection view

If you choose a lock, pick one marked as TSA-recognised, with a clear indicator so you can see whether it was opened. A bag with lockable zipper pulls and no gap behind them is harder to open without a trace, whatever lock you use.

berabags Editorial Team · Maintenance view

Cheap locks can jam, and a jammed lock on a zip can wreck the pulls when it is forced. Test the lock and key at home, keep the code or key separate from the bag, and replace a lock that is stiff or worn.

berabags Editorial Team · Risk view

A lock is a deterrent, not a guarantee. Keep valuables, documents, medicine and electronics in your carry-on. If you find your bag opened, damaged or items missing, report it to the airline at the airport before you leave.

Independent and unofficial. berabags is an independent editorial site. It is not affiliated with, endorsed by or sponsored by any bag brand, retailer, airline or agency named on this page. This page contains no affiliate links; if berabags adds any in future they will be labelled. Rules and policies change, so check the linked source before you act. This is general information, not legal, medical or professional advice.