Groupon customers stuck with gift certificates for the apparently closed Stacked Burger Bar in Saskatoon will be refunded, the online coupon company says.

The company tells CTV News an offer for Stacked restaurant is no longer available on the site. The coupon was being offered up until Tuesday morning, despite Stacked’s apparent recent closure.

Any Groupon customers who were unable to redeem the voucher will be eligible for a refund, a company spokesperson wrote in an email.

More than 500 people purchased the gift certificate, according to the website, but the number of customers who were able to redeem the coupon is still not clear.

CTV News has not been able to reach the owners of Stacked, and the restaurant’s phone is disconnected. The property has been up for sale on a realty website for more than a month.