I haven't actually used a check in a looong time so I don't know exactly what you mean. I do know that I keep the numbers off a check from my checkbook I recei

I haven't actually used a check in a looong time so I don't know exactly what you mean. I do know that I keep the numbers off a check from my checkbook I received when originally opening my bank account like 10 years ago in Lastpass. When sites that don't accept credit need payment information (my student loans mainly) I just copy/paste the numbers into their payment form and the money gets taken out of my account. No verification whatsoever, Nelnet is able to just withdraw the money from my account using those numbers. I assume anybody with a debit processing backend or service can do the same if they have the routing/account #. It's kind of a wonder peoples money doesn't just disappear all the time really.