Reset & Retrieve Lost Combinations - Master Lock

You can securely store your combination or key number with us so that you never lose it. If you lose your key, the number can be used at a locksmith or a hardware store for a new one.

Does your Master Locklock have a serial number? If it doesn't, we won't be able to help you find your combination because we don't have a record of it. Learn how to find your lock's serial number.

If your lock has a serial number, you can recover your combination in one of three ways. You can visit a Master Lock Distributor / Retailer or submit a Lost Combination form.

Distributor / Retailer

1. Bring your lock to the retailer. Be sure that it is not attached to anything. If you do not bring the lock, or it is attached to something, we will not release the combination.
2. Ask them to contact us on your behalf. US distributors can call 1-800-308-9244. Canadian distributors can call 1-800-227-9599.
3. Please note that although Master Lock does not charge for this service, the retailer may charge a fee.

Submit a Lost Combination Form

1. Find your lock's serial number.
2. Print out the Lost Combination Form (PDF).
3. Have the form notarized by a Notary Public to prove you are the owner of the lock. You can include up to 6 combinations on one notarized form.
4. Submit your form to: Master Lock Warehouse 24 North Free Port Drive Nogales, AZ 85621

Once we receive your request, you will receive your combination in approximately 4-6 weeks.

Send a Photo Via Contact Form

1. Send a picture of the lock clearly showing it is not attached to anything The image should clearly show the entire lock and the serial number. The lock cannot be attached to anything. Any photo with digital edits will be rejected.
2. Use the "Contact Us" form to send us the photo. Fill out the form and be sure to select "Lost Combination" option.

We will respond in 7-10 days.

Note: If you are an inmate in a correctional facility, you must submit your request on official prison facility letterhead. In lieu of notarization, the Lost Combination Form must be signed by a prison facility official.