When making a purchase by phone or online, it is not always necessary to have a credit card. Some companies will except an e-check. This is much faster and easier than mailing an actual check. All that is required is the check number, the account number and also the routing number. The routing number also known as the transit number is the first 9 digits located at the bottom of the check. You
. can see an example of this, check this website;http://www.visalaw.com/visajobs/routing.html.