Unauthorized bank account charges

$99 were debited from my checking account. The company name associated with the transaction is Intabill. I contacted my bank and they told me it was an electronic check that came from this company. My bank somehow either reversed or refunded me the money taken (Thank you!) mostly because there was one typo in my name but the check got processed anyway.

I would like to tell everyone about the results of my little investigation that I did to find out why this company debited my account and how they got my information.

This Intabill has a connection with the company called Greenzap. I had an account there some years ago. I never used their services, but I found many  reports linking these two companies. I did not find any information about whether Intabill stole banking info from Greenzap or these two companies are in some agreement. But please report here your findings as well, and we'll find the truth.