If a supporter makes an order and mistypes her email address, the purchase will still complete and the patron will be added to your door list. Fixing it is super easy:
This is one of the hardest design choices to make with a ticketing software. Because the room for human error on any online form is high—and any error that prevents checking out increases the probability the patron won't try again—Artful.ly errs on the side of letting patrons check out so they can still get to your event. Patrons who mistype their emails—but still check out—will be listed on your door list, so even if a patron enters a wrong email address, she can still check in at your event and see your work.
With paid tickets, the patron will usually contact you to double-check if the purchase was successful before attempting to purchase again. When this happens, you can correct the email address on the patron record and an order confirmation may be resent. This information can also be corrected at the door or post-event.
We agree that it's annoying to have misspelled email addresses created in your CRM, but because it's something that can be fixed at a later time, we want to make it as easy as possible for your patrons to attend your event and see your work, rather than have the relationship stop at the ticket buying process.
In our experience, typos in emails effect a small number of patrons compared to the overall audience, and sometimes correcting the information can present an opportunity to deepen a relationship with a patron.