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If your code is not working then you will need to obtain the master code from Sentry.
To do this, you will need to send the model number and serial number of the safe, a notarized letter (last name of notary must be different than that of owner) stating you are the owner of the safe, and a check or money order for $12.00* (U.S. funds) to:Sentry Group, Dept. 200,*****Rochester, NY###-##-####USA.
If using a credit card (Visa/Mastercard only), you can call 1-***-***-**** and fax your Model and Serial number with the notarized letter.