No. You are correct. The US payment system is hopelessly insecure. Anyone who has your numbers can pull money from your account with no further authentication.

No. You are correct. The US payment system is hopelessly insecure. Anyone who has your numbers can pull money from your account with no further authentication. Knuth had to stop writing checks for his bug bounties because of this. https://www-cs-faculty.stanford.edu/~knuth/news08.html https://www-cs-faculty.stanford.edu/~knuth/news08.html