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Someone Moved Out and Still Has a Key

When someone who no longer lives with you still has a working key to your home, your locks need to be rekeyed or replaced – today. The physical tumblers inside your lock still match that key, which means anyone holding it can walk in at any time, whether they intend to or not. Rekeying your locks is the direct fix: a trained technician changes the pins inside the lock cylinder so the old key stops working, a new key works, and you’re back in control of who can open your door.

Call (409) 405-4485

This isn’t a dramatic situation, but it’s a real one. An ex-partner, a former roommate, a previous tenant, an old contractor – any of them could still have a copy of that key, and you may not know whether they made duplicates before they left. The good news is that rekeying is fast, straightforward, and doesn’t require replacing the hardware on your door. Your local Preston Locksmith & Security team handles this every day. The question isn’t whether you should deal with it – it’s whether you want to deal with it now or lose sleep over it tonight.

Why It Happens

The Lock Was Never Changed After the Previous Occupant Left

This is the most common reason people end up in this situation. Whether you moved into a home someone else lived in, or a roommate or partner moved out, the lock on your door is still cut to match every key that was made for it during its entire history. You may not even know how many copies exist. If you’re not the person who originally had the lock installed, assume there are keys out there you’ve never seen.

Keys Were Shared or Duplicated Without Your Knowledge

Most house keys can be copied at any hardware store in about two minutes. If someone had access to your home at any point – even briefly – they may have had a copy made without telling you. You can’t tell from looking at your lock whether this happened, and you won’t know until something feels wrong. If someone had unsupervised access to your keys, treat it as a real possibility.

A Property Manager or Landlord Still Holds a Master

If you’re renting and recently changed units, or if a property management situation changed hands, there may be keys in circulation that were never returned or accounted for. Management companies sometimes hold master keys cut to match multiple units, and those master keys don’t always get tracked carefully when staff turns over. If you don’t know who holds keys to your unit right now, that’s the problem.

Keys Were Left Behind During a Move or Were Not Collected

In a split or move-out situation, it’s easy to assume keys were returned when they weren’t. People forget. Sometimes they hold onto a key with no bad intent and simply never think to return it. The lock doesn’t know the difference between a returned key and one that’s still in a junk drawer somewhere across town. From the lock’s perspective, that key still works, and it will until the pins are changed.

What to Do Right Now

• Stop giving anyone new access until this is resolved. Don’t hand out spare keys or door codes until the lock has been rekeyed. You want a clean slate when the technician is done.
• Make a list of every person who has ever had a key. Include anyone who might have made a copy – cleaners, dog walkers, former partners, contractors. You don’t need to track them all down; you just need to understand the scope so you can decide whether rekeying alone is enough or whether you also want to upgrade the hardware.
• Check whether any keys were returned. If you asked for keys back, do you actually have them, or did you assume? Look at the keys you physically hold and count them against the number that should exist.
• Don’t attempt to swap out lock cylinders yourself. It’s tempting, but incorrectly installed cylinders can leave you with a door that doesn’t latch or lock properly. A technician will have it done correctly in under an hour, and the job comes with a written guarantee.
• If you feel unsafe right now, call (409) 405-4485 immediately. A live person answers around the clock, no voicemail, no callback queue. If there’s any reason you’re concerned about your safety tonight, don’t wait until morning.

How We Fix It

When your local Preston Locksmith & Security technician arrives, the first thing they do is assess what hardware you have. Schlage, Kwikset, Baldwin, Yale – each cylinder gets rekeyed using the manufacturer’s correct pins so the tolerances stay right and the lock operates the way it should. The old key stops working. You get new keys cut on the spot. The whole process on a standard residential deadbolt takes roughly 20 to 45 minutes per lock, depending on the hardware.

If you want to upgrade while we’re there – adding a higher-security cylinder, switching to a Medeco or Mul-T-Lock for bump and pick resistance – that conversation happens before any work starts, and so does the price. You’ll see a written quote for the specific job on your specific door before we touch anything. That’s not a policy we recite; it’s how every job works under The Relay Visibility Guarantee. The service that resolves this is Rekey Locks, and depending on your door’s condition, Door Lock Repair may be part of the visit if we find hardware that needs attention. The 365-Day Done Right Promise covers the work – if it’s not right, we come back and make it right, no charge, no argument.

Frequently Asked Questions

Get It Fixed

Call (409) 405-4485 – a live person picks up around the clock, no voicemail. Your local Preston Locksmith & Security team will give you a real arrival time, a written price before anything starts, and a 365-Day Done Right Promise on the work. Book online or call now.

Written by Kevin Yoon, Owner at Preston Locksmith & Security, part of the Relay Home Co. family since 2008.