Don't use Groupon!
They eat our money for no reason!
During the Thanksgiving holidays, I went to Groupon and got movie tickets to Regal Cinemas in November. The code could not scanned at the theater, so I informed Groupon customer service that evening. A couple of weeks later, they replied and asked me to provide a copy of the tickets. I provided my bank record. Since then, they have never given me any reply so far!