Write down the model and serial number for your safe. You find this information in the owner's manual or on the label outside the safe's door hinge.
Type out a letter requesting a new combination for your safe. In the letter, include the safe's model and serial number and the fact that you're the owner of the safe and in need of a new combination. Have the letter notarized by a notary public who has a different last name from yours.
Send your letter to Sentry Group, Department 200, 882 Linden Ave., Rochester, New York, 14625. Include a check make out to Sentry Group. As of 2010, the fee is $12.
Call 1-800-828-1438 if you would like to pay the fee by using a credit card. In this case, you will need to fax your letter to 585-381-2940 prior to calling.