What did the court decide in TransUnion LLC v. Ramirez?
Answered for: US
To have Article III standing to sue in federal court, plaintiffs must demonstrate, among other things, that they suffered a concrete harm. No concrete harm, no standing.
The Court held that class members whose inaccurate credit files were never disclosed to third parties had not suffered concrete harm and lacked standing. The sentence above is the court in its own words.
This answer is true in US and nowhere else on this site. Another jurisdiction is another answer, or an honest gap: see what has been read for US.