"Scamming on gift card using Groupon.
Three brand new gift cards bought on different dates did not work out of the box.
Called Shell gift card customer service more than 15 times, tried to use and visited shell stations in Dallas, McKinney, and other states several times for help. No help. Same story as mentioned on this link.
Looks like they are selling gift cards that shows balance online but no code printed on magnetic stripes and not accepted by the system---objective-- expecting customers to give up and company make money out of it. A total scammmmmmmmmm-----
http://www.ripoffreport.com/r/Shell-Gas/Houston-Texas-77252/Shell-Gas-ripoff-FALSE-Gift-Card-Advertising-card-cant-be-used-at-a-Shell-station-Houst-166537"