Please be aware that enrollment in the TrustedIDPremier program forces you into binding arbitration, removing your ability to be party to any class-action or even bringing action against Equifax alone should this data breach seriously affect you.
Though the Terms page I linked is going up and down, here's the important part:
...AGREEMENT TO RESOLVE ALL DISPUTES BY BINDING INDIVIDUAL ARBITRATION. PLEASE READ THIS ENTIRE SECTION CAREFULLY BECAUSE IT AFFECTS YOUR LEGAL RIGHTS BY REQUIRING ARBITRATION OF DISPUTES (EXCEPT AS SET FORTH BELOW) AND A WAIVER OF THE ABILITY TO BRING OR PARTICIPATE IN A CLASS ACTION, CLASS ARBITRATION, OR OTHER REPRESENTATIVE ACTION. ARBITRATION PROVIDES A QUICK AND COST EFFECTIVE MECHANISM FOR RESOLVING DISPUTES, BUT YOU SHOULD BE AWARE THAT IT ALSO LIMITS YOUR RIGHTS TO DISCOVERY AND APPEAL...
Friday morning, after social media users began complaining about the arbitration clause, Equifax updated its terms of service to give consumers an escape hatch if they do not wish to be bound by its language.
Here's how the opt-out provision reads:
In order to exclude Yourself from the arbitration provision, You must notify Equifax in writing within 30 days of the date that You first accept this Agreement on the Site (for Products purchased from Equifax on the Site). …
[You] must include Your name, address, and Equifax User ID, as well as a clear statement that You do not wish to resolve disputes with Equifax through arbitration.
This language helps address some of the concerns, but it requires consumers to remember to write to Equifax.
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9/10/17 UPDATE FROM EQUIFAX via same Washington Post article cited above: