[Terretta]

As a customer it's interesting to learn that you would reject "custom" checks since your app shows me the routing number and I can use that (and have used that) to do EFT which asks for the number off the bottom of a check. You make it look like a check, and it works like the number off a check, but a third party printed check using that same number wouldn't work? Good to know.

[smackfu]

They are probably just whitelisting the check numbers that they write, and then rejecting any other check numbers.