I have been disabled since childhood and receive a pension and social assistance for the loss of a breadwinner

That's why they can't take it away.

There is NBU resolution No. 60, which states that the bank is obliged to ask the client to confirm the source of funds. If it is a transfer, replenishment of an account, opening a deposit in the amount of UAH 400,000 or more, then this is mandatory. That is, now citizens will be controlled from where they receive funds and whether they are legal.

In order to protect yourself from future problems, you need to declare your income, insist on official registration and payment of white salary.