https://techcrunch.com/2019/12/14/fbi-national-security-letter-credit-agencies/

Recently released documents revealed the FBI has for years secretly demanded vast amounts of Americans’ consumer and financial information from the largest U.S. credit agencies.

The FBI regularly uses these legal powers — known as national security letters — to compel credit giants to turn over non-content information, such as records of purchases and locations, that the agency deems necessary in national security investigations. But these letters have no judicial oversight and are typically filed with a gag order, preventing the recipient from disclosing the demand to anyone else — including the target of the letter.