The US government released documents related to a court match on Prince Harry’s 2020 visa application on Tuesday, but edited large parts and said it had a duty to protect his privacy and there was no evidence that he received special treatment.

A conservative think tank, the Heritage Foundation, had filed a request for freedom information, and argued that the public had the right to know if the British royal revealed the prior drug abuse, which he described in his memoir, “Reserve”, about his application.

More than 80 pages of courts and prints were released on Tuesday with large sections covered in black.

Immigration officials said the Heritage Foundation had not found that public interest outweighs the right to privacy for Harry, the Duke of Sussex.

“The applicants claim that the items should be disclosed as public confidence in the government would suffer or determine whether the Duke was awarded preference treatment. This speculation from the applicants does not point to any evidence of the government’s mismatch,” wrote Jarrod Panter, an official in US citizenship and immigration services, part of the Department of Homeland Security.

Harry and his American wife Meghan dropped their royal tasks in Britain and moved to the United States in 2020.

Representatives of Harry and Heritage Foundation did not immediately respond to requests for comment.