Rachel Wheat, marketing director with Texoma Community Credit Union, says, "We've had a lot of phone calls ever since about 9 o'clock this morning. We generated a list of all our 600 members and we've been working that list. We're very proactive in making sure people are aware of what's going on."
Wheat says at least 600 of Texoma Community Credit Union's customers are affected.
One Wichita Falls man who says he and his family shop Target stores on a regular basis says it means a closer watch on his account activity.
"My wife loves to use her debit card," Victor Pacheco says. "I will have to go check my account to make sure it's not breached yet."
And customers aren't the only ones inconvenienced by this situation.
"What happens for the financial institutions is any fraudulent activity, we have to pay for that," Wheat says. "So it's unfortunate and very frustrating for us that we did nothing wrong in this situation and we have to foot the bill."
As a consumer, there are steps you can take to make sure hackers don't touch your money.
Monica Horton, president of the Better Business Bureau of North Central Texas, says, "If you used your credit card, you just need to be proactive in checking those credit card statements. Don't wait for the paper statement to arrive in the mailbox."
And if you discover a fraudulent charge, contact your credit card company within 60 days to make sure you're not held responsible.
"If you used your debit card, then Target is currently getting in touch with people at banks of those people who used debit cards," Horton says. "They will be in touch with you as a consumer with instructions on how they're handling it and what needs to happen."
But customers we spoke with say the information fumble won't keep them from shopping target stores, at least long term.
"This is a momentary setback, but I believe they will up their security and it will get better over time," Cody Nowik says. "For now I might stop just to make sure they up the security, but I will eventually go back."
BBB officials say they expect scammers to capitalize on this situation by sending phishing emails and phone calls, so they encourage you to contact your bank if you receive any phone calls or emails prompting you to take action and don't click on any suspicious email links.
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