With the amount of pay that Sonic provides their employees and the option of tipping with cash, I also think there should be an option of tipping with a card. 

Many times I have been Sonic and the servers have been nice, but I only carry a card. I know this is the case with a lot of people. I just think it would be fair for Sonic to allow us to tip with our cards to show we appreciate the service. 

Sonic's computers are mostly upgraded and would allow for this technology. 

In 2014 they had a reply that their systems were not upgraded from the point of sale system. Since then, they have added upgrades to a digital display that would allow tipping in this manner. Please spread the word and sign the position.