THIS ^^^^ Right here will do it.
Practically, it can’t be done.
sitting here I can access Pay pal and any of several Chinese payment sites that can easily transfer money all over the globe with ease and no tracks that amount to much.
For instance, Ican open an account with Barkleys and my cousin in mexico can open an account with Barkleys and I can easily transfer money in small or large amounts. We charge on both ends for the transaction. If necessary, we can open a third account in say Panama and have a cut out.
Any body with a Smart phone can do it