Donald Trump opened Trump Tower on Fifth Avenue in 1983 and occupied the penthouse himself. The building was intended to advertise its owner’s wealth, and also to attract other rich tenants — including, ironically, the very secretive rich. Trump would sell 43 condos in Manhattan’s flashiest building to shell companies based in jurisdictions such as Panama, the Cayman Islands and the British Virgin Islands, which conceal corporate records. He sold another six condos, for cash, to corporations based in Delaware, which has historically had the least transparent company laws in the US.

Not that this was anything exceptional: in the four decades that followed, more than a fifth of the sales in Trump-owned and Trump-licensed buildings, more than 1,300 properties, were made to anonymously owned shell companies, for cash, without a mortgage, which meant the purchasers did not have to have any uncomfortable conversations with lenders.

Some of those companies sold those condos again, very quickly, at much higher prices or at much lower prices — usually a sign that money laundering might have been the actual purpose of the purchase. A Trump-licensed building in Florida sold a two-bedroom condo to a shell company on August 12 2010, for example, for $956,768. That shell company sold the condo to another shell company, at a heavy loss, for $525,000 that same day.