Of course you should make your own judgment of the validity of the source. In this case, it would seem to be a difficult task to invent all of this.
"The Paradise Papers is a global investigation into the offshore activities of some of the world’s most powerful people and companies.
The International Consortium of Investigative Journalists and 95 media partners explored 13.4 million leaked files from a combination of offshore service providers and the company registries of some of the world’s most secretive countries.
The Paradise Papers documents include nearly 7 million loan agreements, financial statements, emails, trust deeds and other paperwork from nearly 50 years at Appleby, a leading offshore law firm with offices in Bermuda and beyond."