Confirmed it was Experian: > You filed a claim in the Equifax Data Breach Settlement and chose to receive free, three-bureau (Equifax, Experian, and TransUnion

Confirmed it was Experian: > You filed a claim in the Equifax Data Breach Settlement and chose to receive free, three-bureau (Equifax, Experian, and TransUnion) credit monitoring from Experian for four years.