Visit the "Recover Your Combination" page from the Customer Care section of the Sentry Safe website (see Resources).
Type in the username and password that you used to register the combination of your safe.
Click "Recover Combination." This will get you the lost safe combination.
Request your combination by mail or fax by sending a completed "Notary Form" to Sentry Safe. You can download a form from the "Recover Your Combination" page. Payment for this method is a $20 research fee. The Sentry Safe fax number is 585-381-2940, and the mailing address is 900 Linden Avenue, Rochester, NY 14625.