What if a friend steals a bank card and causes an illegal event?

Borrowing ID cards, bank cards and the like may not be legal. You can say that you don't know what the other party did, but if you don't know that lending this thing will bear the responsibility of being an accessory to crime, then you are ignorant of the law-it is illegal to break the law. Finding a lawyer can at most reduce your guilt, but it is impossible to escape responsibility.