A security freeze stops an identity thief from opening new accounts or credit by preventing anyone from accessing your credit report. Placing a freeze will not lower your credit score.
This is a free service and can be done easily by contacting the following credit reporting agencies. You will need to contact all three individually either on-line or by certified letter. You may have to provide your full name, address, Social Security number, and date of birth, addresses for the last five years.
P.O. Box 105788
Atlanta, GA 30348
https://www.freeze.equifax.com/Freeze/jsp/SFF_PersonalIDInfo.jsp
P.O. Box 9554
Allen, TX 75013
https://www.experian.com/consumer/cac/InvalidateSession.do?code=FREEZECENTER
P.O. Box 6790
Fullerton, CA 92834-6790
https://annualcreditreport.transunion.com/fa/securityFreeze/landing
If you are placing a freeze by certified mail, you may use the sample letters available online at www.in.gov/attorneygeneral/2413.htm.