Credit Bureaus
Three nationwide credit bureaus keep records of your credit history. If someone has misused your personal information or even if you're concerned about identity theft but haven't yet become a victim, you can place a fraud alert.
Contact the national credit bureaus to request fraud alerts, credit freezes (also known as security freezes), and opt outs from pre‑screened credit offers.
Equifax: https://www.equifax.com/personal/credit-report-services or 800–685–1111
Experian: https://www.experian.com/help or 888–397–3742
TransUnion: https://www.transunion.com/credit-help or 888–909–8872