Home Depot on Wednesday updated customers on a possible payment data breach it is investigating, saying that if the company discovers wrongdoing customers will not be responsible for fraudulent charges.

The Atlanta-based home improvement giant confirmed on Tuesday that it was looking into “unusual activity” that might indicate a breach, but stopped short of saying that data had been stolen.

Corporate data breaches are becoming increasingly frequent as businesses centralize more and more user information that hackers can exploit. Retailers recently hit include Target, grocer Supervalu, restaurant chain P.F. Chang’s and thrift store operator Goodwill.

“If we confirm a breach has occurred, we will make sure our customers are notified immediately,” the Atlanta-based home improvement Home Depot said on its website Wednesday.

The company advised customers to monitor closely their accounts for any unusual activity and promised to offer free identity protection — including credit monitoring — should the company confirm a breach has occurred.

“We’re working hard to get you the information you need as quickly as possible and will continue to provide updates as we learn more,” Home Depot said.