Whats the reason for suspending the account, what did they say?
Just the sae question i was abiut to ask, what i can deduce from the op's statement is the fact that he may have been involved in some money laundering activities that have led to the stake asking him for such legal documents as proof of funds.
Just curious here too, maybe he deposited big and Stake finance team tracked it back to shady original crypto adress. Maybe OP has deposited big in short timeframes or used prepaid debit card on MoonPay that is main cashier partner of Stake.