Staples is investigating a possible security breach.

Staples announced last week that it is in the midst of investigating a security breach.

Independent security expert Brian Krebs first broke the news that banks were recognizing a pattern of card fraud that seemed to originate from Staples stores in the Northeast. Specifically, Krebs believed that seven stores in Pennsylvania were possibly breached, as well as three in New York and one in New Jersey.

“We take the protection of customer information very seriously, and are working to resolve the situation,” Staples spokesperson Mark Cautela said in a statement to the public. “If Staples discovers an issue, it is important to note that customers are not responsible for any fraudulent activity on their credit cards that is reported on a timely basis.”

Staples currently has 1,800 stores in the U.S. and it’s unclear yet whether any other locations were affected by the breach.

Data breaches can be devastating for retailers, especially for small businesses that don’t necessarily have the resources to pay expensive legal fees. Breaches can also erode customer loyalty and trust, which will take a toll on revenue.

Most company revenue is generated during the holiday season that is fast approaching. This means that more credit and debit cards will be swiped at brick-and-mortar locations, and the ramifications of a possible data breach skyrocket. Last year, Target’s holiday sales were hit hard by the news of the massive breach, and no company wants to experience that kind of costly backlash.

As your company prepares to enter the holiday shopping season, make sure you are using the most secure point of sale retail software possible. It’s worth changing systems to make your business more secure for both you and your valued customers.