I 've read in US forums that the IRS might mail you a check if you have a tax return. I 've also heard from expatriates living overseas who received such a check that they "simply" mailed it back to their bank in the US.
Coming from Europe I don't believe I've ever seen checks being casually mailed around, even back when checks were actually a thing . Are there any precautions that people operating in the US banking system can take under such circumstances?
E.g. I know that in some parts of the world, if you manually strike(with a pen) two parallel lines diagonally across the face of the check, that ensures that no one else can cash it, but you. This buys some peace of mind as in the event of the check falling in the wrong hands, it's useless to any third person (even if they forge your signature) and may only be deposited in an account that bears your name.
So what are some typical safety-oriented practices when mailing checks through the postal system or when carrying checks on one's person?