Equifax
Equifax has not responded to the public comment by this site's author to the Federal Reserve Board. See Part Two, Dirty Data, creditaccuracy.com.
Letters to management and the board
Equifax background and history, by Funding Universe; legend says that the word "Equifax" was coined to mean "equitable factual information"
Equifax ran into some serious credibility problems when it blatantly broke the law, thumbing its nose at the Fair Credit Reporting Act requirement for full disclosure of consumers' files to those consumers. Illegally held secret "internal information" about consumers, and failed to disclose it to those consumers as required. A grand history of snooping silliness dating to the 19th century.
Experian
"Max" explains the whole, nasty confusion about the credit score thing, chiding, "don't focus on the numbers."
Get a second opinion.
"Corporate fact sheet"
Letter to management, Lord Wolfson
TransUnion
If you can understand this, please write. Fair Isaac's excuse fuels the fire: Full disclosure is required.
Blue Ribbon Letters