How do you retrieve payment reference number for groupon?

To retrieve your payment reference number for a Groupon purchase, log into your Groupon account and navigate to the "My Groupons" section. Find the specific deal you purchased and click on it to view the details, where the payment reference number is usually listed. Alternatively, check your email confirmation, as the reference number is often included in the purchase receipt sent to your email. If you need further assistance, you can contact Groupon customer service for help.