On 10 April, Rapid City Police announced they are investigating a series of credit card skimmers found inside pumps at several area gas stations. They stated that the skimmers they’ve found so far have been inside the pumps where they’re not visible to consumers.
You are recommended to monitor your credit cards and bank accounts (a practice we encourage for everyone, all the time). If you notice any fraudulent activity, report it to your financial institution immediately.
In fact, how much you lose depends on the card you used and how quickly you report the problem.
Many ATM/Debit Cards issuers have voluntarily agreed that an account holder will not owe more than $50 for transactions made with a lost or stolen ATM or debit card. However, under the law, the amount you can lose depends on how quickly you report the loss.
For credit cards, you loss is limited to $50 as long as you dispute the fraudulent charges within 60 days of receiving your bill.
For a better understanding of gas pump credit card skimmers here is a story by ABC News from August 2013 showing how the skimmers work and how your are at risk.