Long lines at the stores this holiday shopping season can also mean big business for counterfeit thieves!

Every year, officials say the amount of counterfeit cases goes up when the holiday rush hits.

At Horizon Bank in South Bend they have a few ways to catch counterfeit. One high tech device uses an ultra violet light to look for a security strip that's now built into larger bills.

They also hand out markers to their customers that shows whether the bill is fake.

But bank employees are trained on how to "feel" whether the bill is real. That is one of the biggest giveaways of counterfeit.

“We train like I was showing you how to pull that bill… we train that... so you'll understand that it feels so different… because let me tell you nine times out of ten you can tell it’s counterfeit by the feel,” says Carla Kanney, Senior Vice President of Risk Management at Horizon Bank.

Experts say big department stores are usually hit the hardest since they have the most traffic.