Billionaire Australian Lex Greensill is fighting to save his empire from collapsing after one of his biggest customers, Credit Suisse, blocked a big chunk of his cash flows by halting purchases of Greensill Capital’s packaged invoices.

Greensill, which has hired restructuring adviser Grant Thornton, is considering options to raise cash, including selling off assets, and will seek the protection of safe harbour laws in Australia if it ends up falling into administration.