What did the court decide in Spokeo, Inc. v. Robins?
Answered for: US
Article III standing requires a concrete injury even in the context of a statutory violation
The Court held that a bare procedural violation of a statute, without concrete harm, does not by itself establish standing to sue in federal court. 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.