This happened to one of our clients. Four patrons didn’t receive their Webtix receipt on two different days and times and the box office didn’t received them, either. We use Postmark for email services that allows us to keep track of Wintix and Webtix receipts being emailed.
What we think happens in a case like this is that there is a hiccup or break in internet communications, like when you are talking on a cell phone and can only hear every other word or the call is dropped. Unfortunately, this is not something we can duplicate.
Internet connectivity is beyond our control.