Providers are not banks no confirm that
The Financial Institution (call it bank, emi, pp, investment traders, fund management companies,etc) have the right to share information with tax authorities, it does not mean that they always︀ do it, specially when it comes to HNWI, they always find the way to protect︁ as much as they can this clients
Also, even if there is no ''investigation'', they︂ can still share information