Please remember that this lesson is a living document and is subject to change.
Now that you have followed the processes and lessons in this Wiki-Lesson, I have some additions for you.
There are Check Services that a company can use to verify a check that is written to them for payment. Some of these services are separate from the bank the company uses.
Here is a link to Wikipedia where they explain this: https://en.wikipedia.org/wiki/Check_verification_service
Interested in know more about banking from Wikipedia? Use this link: https://en.wikipedia.org/wiki/Banking_in_the_United_States